B737 Cockpit Companion Pdf May 2026

The B737 Cockpit Companion by Captain Bill Bulfer is one of the most respected technical resources in the aviation world, serving as a vital bridge between official manufacturer manuals and the practical needs of line pilots. While many users search for a "B737 Cockpit Companion PDF," it is important to understand that the official evolution of this resource has shifted toward a highly interactive iPad application and physical spiral-bound books. What is the B737 Cockpit Companion?

Unlike a standard Flight Crew Operations Manual (FCOM), which often adheres to a strict "need-to-know" philosophy, the Cockpit Companion provides an in-depth "theory of operation" for Boeing 737 systems. Written by Bill Bulfer, a veteran airline captain, it explains not just what a switch does, but how the underlying system functions and how it interacts with other components. Key Features of the Series

The guide is available in different versions tailored to specific 737 generations, including the Classics (-300/400/500), the Next Generation (NG) (-600/700/800/900), and the 737 MAX.

High-Resolution Schematics: Features detailed vector-based drawings of electrical, hydraulic, and pneumatic systems.

Circuit Breaker Locator: Includes an extensive, alphabetized list of circuit breakers with their locations and power sources.

Panel-by-Panel Descriptions: Every light, switch, and indicator in the cockpit is meticulously detailed.

Practical Insights: Notes derived from decades of real-world flying experience that clarify complex system behaviors often glossed over in official training. PDF vs. App vs. Physical Book B737 Cockpit Companion - App Store - Apple

The B737 Cockpit Companion is a widely recognized technical guide used by airline pilots and flight simulation enthusiasts to understand the complex systems of the Boeing 737 aircraft series. Originally authored by retired airline Captain Bill Bulfer, the guide provides in-depth explanations that go beyond basic "need-to-know" information, covering system functionality, theory of operation, and cockpit panel layouts. Key Features and Content

System Deep Dives: Detailed technical breakdowns of critical systems, including bleed air, engine indications, and wheel braking.

Panel References: Identification and explanation of every switch and light on the overhead, forward, and electronic panels.

Targeted Versions: Different editions exist for specific 737 generations, such as the 737 Classic (EFIS/EIS), 737 NG (Next Generation), and the 737 MAX.

Educational Depth: Includes unique insights, such as identifying which systems are affected when a fire handle is pulled. Modern Formats and Availability

While originally a series of physical books, the guide is now available in several digital formats:

PDF Versions: Digital copies for various 737 series (e.g., NG, Classic) are often hosted on platforms like Scribd and Google Drive.

Mobile Apps: The 737 Handbook app serves as an interactive successor, featuring interactive schematics, videos, and flashcards for sim or interview preparation.

Searchable Databases: Some digital versions feature a database engine with over 700 indexed items linked to the main text for quick referencing. Related Resources

For those studying the 737, other popular technical guides include: Приложение «737 Handbook - App Store - Apple

Introduction

The Boeing 737 is a narrow-body, twin-engine jet airliner that has become one of the most popular and widely used aircraft in the world. The 737 cockpit is designed to provide pilots with a safe and efficient means of controlling the aircraft, and it is equipped with a range of instruments, systems, and controls.

Cockpit Layout

The 737 cockpit is divided into several sections, including:

Flight Deck: The flight deck is the main working area of the cockpit, where the pilots sit and control the aircraft.
Instrument Panel: The instrument panel is located in front of the pilots and contains a range of instruments and controls, including the primary flight display (PFD), navigation display (ND), and engine instruments.
Overhead Panel: The overhead panel is located above the instrument panel and contains controls and switches for various aircraft systems, including electrical, hydraulic, and pressurization.
Pedestal: The pedestal is a console located between the pilots' seats and contains controls and switches for the aircraft's systems, including the autothrottle and flap controls.

Instruments and Controls

The 737 cockpit contains a range of instruments and controls, including:

Primary Flight Display (PFD): The PFD displays critical flight information, including altitude, airspeed, heading, and attitude.
Navigation Display (ND): The ND displays navigation information, including the aircraft's position, route, and nearby airports.
Engine Instruments: The engine instruments display information about the aircraft's engines, including thrust, fuel flow, and oil pressure.
Autopilot and Autothrottle: The autopilot and autothrottle systems allow the aircraft to be flown automatically, and the controls for these systems are located on the pedestal.
Flap and Slat Controls: The flap and slat controls are located on the pedestal and are used to control the aircraft's high-lift devices.
Landing Gear Controls: The landing gear controls are located on the pedestal and are used to control the aircraft's landing gear.

Systems

The 737 cockpit contains a range of systems, including:

Electrical System: The electrical system provides power to the aircraft's systems and is controlled from the overhead panel.
Hydraulic System: The hydraulic system provides power to the aircraft's hydraulic systems, including the landing gear and flaps.
Pressurization System: The pressurization system controls the air pressure in the aircraft's cabin and is controlled from the overhead panel.
Fuel System: The fuel system manages the aircraft's fuel supply and is controlled from the overhead panel.

Controls and Switches

The 737 cockpit contains a range of controls and switches, including:

Thrust Levers: The thrust levers control the aircraft's engines and are located on the pedestal.
Flap Switches: The flap switches control the aircraft's flaps and are located on the pedestal.
Landing Gear Switches: The landing gear switches control the aircraft's landing gear and are located on the pedestal.
Autopilot Switches: The autopilot switches control the aircraft's autopilot system and are located on the pedestal.

** Warning and Alert Systems**

The 737 cockpit contains a range of warning and alert systems, including:

Master Warning: The master warning system alerts the pilots to critical system failures or warnings.
Master Caution: The master caution system alerts the pilots to non-critical system failures or warnings.
Warning Lights: The warning lights display critical system failures or warnings, including engine failure and system malfunctions.

Boeing 737 Cockpit Companion PDF

The Boeing 737 Cockpit Companion PDF is a comprehensive guide to the 737 cockpit, covering the aircraft's systems, instruments, and controls. The guide includes detailed diagrams and illustrations of the cockpit layout, as well as explanations of the aircraft's systems and operations.

Conclusion

The Boeing 737 cockpit is a complex and sophisticated system that requires a deep understanding of its instruments, controls, and systems. This guide has provided a comprehensive overview of the 737 cockpit, covering its layout, instruments, controls, systems, and warning and alert systems. Whether you're a seasoned 737 pilot or just starting your training, this guide is intended to be a valuable resource in your journey to become familiar with the 737 cockpit. b737 cockpit companion pdf

References

Boeing 737 Cockpit Companion PDF
Boeing 737 Flight Crew Operations Manual
Boeing 737 Systems Manual

Recommended Reading

Boeing 737 Technical Manual
Boeing 737 Flight Crew Training Manual
Boeing 737 Systems and Instruments Handbook

The B737 Cockpit Companion by Bill Bulfer is considered a premier technical reference for pilots and simulator enthusiasts, offering in-depth system knowledge, schematics, and configuration customization. While traditionally a book, the resource is now primarily available as an interactive digital app, featuring regular updates for various 737 models. For more details, visit the Airliner Apps website. B737 Cockpit Companion

Option 3: Email / Newsletter Blurb

Subject: 🛫 New: B737 Cockpit Companion PDF – Learn the flight deck in 10 min.

Body:
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B737 Cockpit Companion authored by retired airline Captain Bill Bulfer

, is a definitive technical reference used by professional pilots and flight simulation enthusiasts worldwide. It provides an in-depth "theory of operation" for Boeing 737 systems that often exceeds the standard information found in official Flight Crew Operating Manuals (FCOM). Key Content and Features

The guide is structured to help pilots move beyond a basic "need-to-know" understanding to a comprehensive mastery of the aircraft's internal logic. System Deep Dives

: Detailed explanations of every switch, light, and panel, including the Overhead Panel Glareshield Control Stand Technical Schematics

: High-resolution, vector-based diagrams for electrical, fuel, pneumatic, and hydraulic systems. Reference Tools

: Includes an alphabetized circuit breaker locator, an extensive glossary, and Master Minimum Equipment List (MMEL) samples. Operational Notes

: Incorporates real-world insights from Bill Bulfer's decades of experience as a line pilot. Available Formats

While many users search for a PDF version, the resource has evolved into several distinct formats: Physical Books : Often available at specialty retailers like AirlinerApps , these are pocket-sized for easy storage in the cockpit. B737 Cockpit Companion App : The most modern version, available on the Apple App Store

. It features interactive touch navigation and a powerful database engine for different configurations. Variant-Specific Guides : Covers various models including the (-300/400/500), (-600/700/800/900), and the Primary Uses B737 Cockpit Companion - App Store - Apple

B737 Cockpit Companion is a highly regarded pilot's technical guide, often found in digital PDF or app formats, designed to simplify the complex systems of the Boeing 737.

Depending on what you are looking for, this query could refer to a few different things: educational content and technical features of the book itself. digital features of the PDF/App version (searchability, updates). Purchasing options for the physical or digital editions. summary of the technical systems covered in the guide, or do you need help finding where to buy the digital version? Key Features of the B737 Cockpit Companion System Overviews: Provides high-level explanations of Primary Flight Controls like elevators, ailerons, and rudders. Circuit Breaker Maps: Detailed locations for various panels, such as the and crew oxygen shutoff valves. Component Locations:

Quick-reference diagrams for locating thousands of parts and miles of wiring within the airframe. Model Coverage: Variants ranging from the "Jurassics" to the latest For more specific pilot data, you can check The Boeing 737 Technical Site for detailed technical logs and system updates. Are you interested in a specific aircraft variant (like the MAX vs. the NG), or are you trying to a copy for your own flight simulation?

✈️ Bridging the Gap Between Hardcore Aviation & Pure Entertainment! 🕹️🍹

Ever wondered what it takes to command the world’s most famous twin-engine jet? Whether you are a flight sim gamer looking to take your home cockpit setup to the absolute max, or a frequent flyer who just loves understanding the magic of flight, we have the ultimate rabbit hole for you. Say hello to the legendary B737 Cockpit Companion PDF

(originally created by Bill Bulfer)! This isn't your standard, dry flight operations manual. It is an incredibly detailed, switch-by-switch breakdown of the Boeing 737.

Why this is pure entertainment for avgeeks and casual fans alike: Level Up Your Flight Sim:

If you play Microsoft Flight Simulator or X-Plane, pulling up this digital guide makes you feel like a real-world captain. You can actually understand what every single knob, light, and hydraulic switch on that overhead panel does! Impress Your Friends:

Learn the "theory of operation" behind how planes handle emergencies or route air through the cabin. Ultimate Couch Reading:

Swap out your mindless scrolling for a deep dive into massive schematics and interactive layouts. It is the perfect digital coffee-table companion for anyone obsessed with heavy machinery and engineering.

Did you know that in total hydraulic failure, pilots can still manually fly and land a 737 using pure mechanical cables and physical brute strength? It is a true pilot's aircraft! How to find it:

While the app store offers interactive mobile versions, you can find digital PDF study guides and community excerpts on document-sharing platforms like or through dedicated flight sim communities! Let’s hear it in the comments! The B737 Cockpit Companion by Captain Bill Bulfer

Are you a flight simulator pro, or do you prefer to sit back in the passenger cabin and enjoy the in-flight movies? Let us know below! B737 Cockpit Companion - Education App - MWM

The B737 Cockpit Companion by Bill Bulfer is a technical reference guide used by airline pilots and simulator enthusiasts for in-depth Boeing 737 systems knowledge. While often searched for as a "PDF," its primary official digital presence is currently an interactive iPad application. Core Content and Features

The guide provides a "theory of operation" for every switch, light, and panel in the cockpit, going deeper than standard flight crew operating manuals (FCOM).

System Coverage: Extensive details on the B737-600 through -900 (Next Gen), BBJs, and the 737 MAX.

Cockpit Sections: Covers everything from the forward and aft overhead panels to the throttle quadrant and pedestal electronics. Technical Tools:

Circuit Breaker Locator: An extensive index with power sources and locations.

Vector-Based Schematics: Detailed diagrams showing how systems interact.

App-Specific Tools: Includes a built-in glossary, note-taking, flashcards, and a quizzer feature.

Professional Pilots: Often used as a study aid for initial type ratings or recurrent training. Pilots also use it for quick system cross-references during line operations, such as gaining more background on a Minimum Equipment List (MEL) item.

Simulator Enthusiasts: Valuable for building home cockpits or configuring complex flight simulators, as it explains the specific conditions under which lights illuminate or switches function. Official Formats and Availability

The guide is available in several forms through Leading Edge Publishing and authorized retailers like AvPay or The Pilot Shop:

Physical Book: Known for its concise, pilot-friendly layout and physical schematics.

iPad App: Regarded as superior by some for its instant cross-referencing and interactive cockpit mockup—simply tap a switch to see its description.

Bundles: Bulfer also produces the FMC User's Guide, which can be added to the iPad app via subscription or purchased as a separate manual for deep-dive flight management computer training. B737 Cockpit Companion - App Store - Apple

I notice you’ve asked for an essay based on the search query "b737 cockpit companion pdf". However, I cannot produce a full essay that assumes the existence of or promotes a specific unauthorized PDF document, especially one that might infringe on copyrighted material (such as proprietary Boeing or airline training manuals).

Instead, I can offer you the following structured, informative essay about the purpose and value of a “cockpit companion” for the Boeing 737, while respecting legal and intellectual property boundaries.

Short story — "Cockpit Companion"

The flight bag smelled of warmed vinyl and lemon polish. Jonah flipped through the pages of a battered PDF on his tablet—an unofficial cockpit companion for the Boeing 737 he'd studied for months. The file had been passed along by a retired captain at the flight club, stitched together from checklists, anecdotes, and hand-drawn diagrams. To Jonah it felt like a talisman.

He had landed into this week-night cross-country as a newly minted first officer, green enough that fluorescent lights in the ops room still made his stomach flutter. Tonight’s pairing was a calm captain named Reyes, whose uniform creases said patience and whose voice said safe. Jonah offered the tablet before taxi; Reyes waved him off with a small smile.

"Keep it. Best stories are the ones you read in motion," Reyes said.

Jonah thumbed the PDF open again as engines warmed. The first section was plain checklist—cold and necessary. Below it, a typed note read: "Know the airplane, know yourself." Jonah liked that line; it read like permission to belong.

On climb out, as they threaded through cotton-clouds and the city lights winked below, Jonah found a page titled "Unwritten Procedures." It wasn't procedural at all but a string of short vignettes: a copilot who saved a flight by noticing a mis-set altimeter; a captain who hummed the same lullaby into his headset to settle nervous passengers; an instructor who insisted every pilot learn to troubleshoot a stuck trim by feel.

Jonah imagined the people behind the notes—hands that had mapped a problem by touch across a metal yoke, voices that had learned cadence in stormy nights. The stories felt like a lineage, a quiet chain of small choices that kept an airplane airworthy.

Over the next hours the PDF became a companion. During cruise, Jonah scrolled to an appendix of cockpit etiquette: "Callouts are crew medicine. Poor calls, poor outcomes." He practiced crisp radio-readbacks under his breath, savoring how language could steady the work.

Halfway to their destination, the weather ahead closed in. ATC rerouted them around cells of thunderstorms, and Reyes's calm shifted from ease to intent. A minor anomaly cropped up—an interior light flickering in the galley—but it was the little things that reveal character. Jonah remembered a different page in the PDF: "When boredom bites, attention wanes. Treat every light as a potential symptom." He signaled, checked, and confirmed with Reyes. The light was traced to a loose panel and logged. The gesture was small; it threaded him into practice.

Descending through scattered showers, a cabin call came: a passenger with severe airsickness in 26A. Jonah felt the old rookie impulse to fumble and over-apologize. Instead he reached to the PDF's human section—short paragraphs on passenger care, not regulations. "Offer water. Speak calmly. Reassure what you can," it said. He relayed a few measured phrases to the flight attendant, who thanked him with tired relief. The passenger quieted. Jonah felt a quiet pride that had nothing to do with procedure and everything to do with being useful.

On final approach, a crosswind gust bent the airplane like a reed. The runway lights shimmered through rain. Jonah's hands found the yoke by muscle memory he'd practiced in sims and by lines he’d read late at night. Reyes's corrections were sparse but exact. When they touched down with a gentle, controlled firmness, Jonah felt the PDF's words settle inside him like ballast.

Later, at the gate, the captain closed the throttle and faced Jonah. "How was your companion?" he asked.

Jonah tapped the tablet, then the pages, then Reyes's eyes. "Terrible book for getting nervous," he said, and Reyes's laugh loosened the long journey.

"Good," Reyes said. "A proper cockpit companion should make you think, not soothe you. It should make you better."

Jonah uploaded a note into the flight log—dry, official lines about performance and maintenance. Then, before shutting down his tablet, he opened a blank page and typed a short paragraph into the PDF: a small scene about a first officer who learned to steady his calls during a storm, who offered water to a sick passenger, and who learned that a file could be more than ink and pixels—it could be an inheritance.

He signed it with his initials and a date, leaving room for the next pair of hands to find the note, to add a correction, an anecdote, or a sketch of a knob. The cockpit companion was never finished; it simply gathered people who cared enough to write.

As he walked away from the jet into cool tarmac air, Jonah realized the most valuable pages were the ones not found in any official manual: the ones that taught how to be human while operating something that demanded precision. The PDF had started as a tool. By the time he reached the terminal lights, it felt like a small, living lineage—one pilot passing on steadiness to the next, one note at a time. Flight Deck : The flight deck is the

The B737 Cockpit Companion (often referred to as the "Bulfer book") is a legendary, highly regarded technical guide for Boeing 737 pilots and enthusiasts, authored by retired airline Captain Bill Bulfer. While historically a paper book, it is now primarily available as a comprehensive iPad/tablet app, and sometimes found as unauthorized PDFs.

Here is a review based on its reputation and current app-based format as of 2026. Overview & Purpose

The Cockpit Companion is not a procedural guide (like an SOP or QRH). Instead, it is a deep-dive systems book designed to teach pilots "how the airplane is built" and "how the systems work," focusing on "theory of operation" rather than just the "need to know" philosophy of modern training. What the B737 Cockpit Companion Covers

Detailed Panel Explanations: Deep analysis of every switch, light, and function on the overhead, glareshield, pedestals, and center panels.

Vector-Based Schematics: High-resolution drawings explaining mechanical and electrical systems, such as bleed air, hydraulics, and fuel.

Circuit Breaker Locator: A comprehensive index listing item, location, power source, and ATA chapter.

System Notes: Insights into system functionality, minimum equipment considerations, and "pilot-friendly" notes, often going beyond the official FCOM.

737 Variations: Covers the 737NG (600-900), Classic (EFIS/EIS), and includes 737 MAX differences.

Unmatched Depth: Often provides details that official company manuals omit, filling the gaps for a deeper understanding of the aircraft.

Visual Learning: Excellent color diagrams and photos make complex systems easy to understand.

Interactive (App Version): The app version allows you to tap a cockpit component on a photo and immediately see the associated system notes, making it faster than searching physical manuals.

Invaluable for Training/Sims: Considered "mandatory" reading for home cockpit builders and excellent prep for type ratings or recurrent training. Weaknesses & Limitations

Not Airline Specific: Because it is a generic guide, it may not match the specific limitations, MEL, or configurations of your operator.

App Cost: The app can be considered expensive, although users generally feel it is worth the price.

Paper Book Rarity: The physical book is no longer manufactured by the author, making it harder to find, with the app being the primary updated source.

Complexity: Contains more information than required for a basic oral exam, which might be overwhelming for new trainees. PDF vs. App B737 Cockpit Companion - Ratings & Reviews - App Store

B737 Cockpit Companion by Bill Bulfer is a widely used reference guide for airline pilots that provides in-depth technical details on Boeing 737 systems beyond basic "need-to-know" training. While often referred to as a "PDF," it is primarily available as a physical book or a specialized iPad application Core Content Overview

The guide covers technical specifications, schematics, and operational notes for the 737-600, 700, 800, 900 (NG) Leading Edge Publishing Приложение «B737 Cockpit Companion - App Store

Here’s a short descriptive piece you could use for a product listing, review, or website section for a B737 Cockpit Companion PDF:

Title:
B737 Cockpit Companion PDF – Quick Reference for the Modern 737 Pilot

Description:
Designed for Boeing 737 pilots (NG and MAX), the B737 Cockpit Companion PDF is a streamlined, easy‑to‑navigate digital guide that puts essential cockpit data at your fingertips. Whether you’re in initial type rating, recurrent training, or lining up for departure, this companion helps you reduce head‑down time and fly with greater confidence.

What’s Inside:

Memory items and immediate action drills
FMC quick setup flow
V‑speeds, thrust settings, and callouts
Systems summary (electrical, hydraulic, pneumatic, flight controls)
Limitations and operating speeds
Approach and go‑around briefings
Cockpit flow patterns (before start, after start, before taxi, etc.)
QR code links to video or expanded procedures (if hyperlinked)

Format:

Fully bookmarked PDF (works on iPad, EFB, laptop, or printed as a kneeboard card)
Optimized for both day and night cockpit lighting
Print‑friendly monochrome pages with red‑preserving night mode option

Ideal for:

First officers building line experience
Captains preparing for line checks or sims
Flight instructors and type rating students
737 pilots transitioning between NG and MAX

Note:
This is a pilot‑created performance support tool — not a substitute for the official FCOM, QRH, or company manuals. Always follow approved data.

Here’s a draft for content focused on a “B737 Cockpit Companion PDF” — useful for a product listing, blog post, or download description. You can adjust the tone depending on your audience (pilots, students, or flight sim enthusiasts).

Important Disclaimer

It is vital to note that the B737 Cockpit Companion is a study aid, not an official approved document. It is considered "grey literature" in the aviation community—highly accurate and respected, but not a replacement for the aircraft's approved Flight Manual (AFM) or the company's specific FCOM.

Pilots should always cross-reference the Companion with their airline's approved manuals, as system modifications and procedures can vary between different operators and specific aircraft line numbers.

Who Uses It?

The guide is a staple for:

New Type Rating Students: It serves as a "cliff notes" version of the FCOM, helping students survive the intense ground school phase of a B737 rating.
Simulator Instructors: It acts as a quick reference for setting up scenarios and explaining system failures to students.
Line Pilots: For reviewing limitations or refreshing knowledge on rarely used systems during cruise flight.

What is the B737 Cockpit Companion?

The B737 Cockpit Companion is a widely respected study guide designed to bridge the gap between the Flight Crew Operations Manual (FCOM) and practical, line-flying knowledge. While the FCOM is the authoritative source for limitations and procedures, it is often voluminous and written in strict regulatory language. The Cockpit Companion acts as a distilled, user-friendly reference that simplifies complex systems into digestible insights.

It is widely used during Initial Type Ratings, Upgrade training, and recurrent ground school to help pilots visualize and understand the "why" behind the switches and indicators.