# B737 CB — 737 NG & MAX Circuit Breakers

> 737 NG & MAX Circuit Breakers (iPhone/iPad app by Vecihi LLC.)

- Source: https://appshunter.io/ios/app/b737-cb/id1450338455 (this page in markdown: same URL + `.md`)
- Developer: [Vecihi LLC](https://appshunter.io/developer/1448838179)
- Category: Reference, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 14 MB
- Languages: Australian English, Arabic, Bangla, Catalan, Croatian, Czech, Danish, Dutch, Finnish, Canadian French and 34 more
- Released: 2019-01-31
- Data updated: 2026-11-13

## What is B737 CB?

B737 CB shows where every circuit breaker is on the 737 NG and the 737 MAX. Search by name, abbreviation or position, and see the CB highlighted on an interactive diagram of its panel, with a locator that shows where that panel is on the airplane.

Made by a 737 pilot for pilots, engineers and maintenance technicians.

ON THE FLIGHT DECK AND ON THE LINE
• Find a CB in seconds by the name you know it by, with its panel, row and column
• Panel, ATA chapter, power bus, CB number and rating in one place
• Keep track of CBs pulled or marked during maintenance or under the MEL
• All the data is on your device, so no connection is needed

SEARCH THE WAY YOU TALK
• Names and abbreviations such as “xpdr”, “stby compass” or “wipers”
• Positions (P6-2 C3 or p62c3), ATA chapters, power buses and CB numbers
• Typo-tolerant, with suggestions and filters by panel, ATA system and bus

SEE IT ON THE PANEL
• Interactive diagrams drawn like the real panels: zoom, pan and tap any knob
• A flight-deck locator shows where the panel is; galley CBs have a cabin locator
• The P18 and P6 walls with every panel in place, plus the panels at the pilots’ feet, in the E/E bay and in the galleys

EVERY CB IN DETAIL
• Position, ATA chapter, power bus, CB number, rating, effectivity and notes
• Other CBs on the same bus, in the same chapter and nearby
• A confidence level on every CB; a CB that is not confirmed is marked Verify
• Copy the position, or share the CB with a picture of its panel

CB TRACKER
• Log a CB as pulled, pulled & marked (collar, clip or tag) or marked only, with the mark’s color, the MEL item or reason, and the work order
• Tracked CBs show on every panel diagram until you reset them, and you can share the active list

YOUR OWN CBs, FAVORITES AND NOTES
• Add your own CB to an empty hole or a blanking plug. It is shown in teal, separate from the app’s data
• Favorites, a note on any CB, recent searches and recently viewed CBs
• iCloud sync of favorites, notes, your own CBs and the CB tracker, through your own iCloud account

737 NG AND 737 MAX
• The 737 NG (737-600, -700, -800, -900 and -900ER) is free, with every feature
• The 737 MAX (737-8, -8200 and -9) is a one-time in-app purchase, the 737 MAX Pack: every 737 MAX circuit breaker, panel and diagram, plus an NG ⇄ MAX comparison for the CBs on both aircraft
• No subscription. Buy it once and use it on iPhone, iPad and Mac with the same Apple Account

ONE APP FOR EVERY DEVICE
• A layout of its own on iPhone, iPad and Mac, with keyboard shortcuts on iPad and menus on the Mac
• Siri and Shortcuts (“Find a circuit breaker in B737 CB”), Spotlight, Handoff, and drag and drop
• Light and Dark Mode, VoiceOver, Dynamic Type, Increase Contrast and Reduce Motion
• More than 40 languages; CB names and panel print stay in English, as on the airplane

PRIVATE BY DESIGN
• No account, no sign-in, no ads, no analytics, no tracking
• No data collected: what you save stays on your devices, and in your own iCloud account while iCloud sync is on

IMPORTANT
B737 CB is an independent app, not affiliated with or endorsed by The Boeing Company. It is a reference only: always follow the approved documentation and procedures for your aircraft.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 737 MAX Pack | $9.99 | one-time |


## Is B737 CB safe?

Not enough ratings yet to assess B737 CB.

## Is B737 CB legit?

B737 CB appears to be a legitimate app. The AppsHunter Legitimacy Score for B737 CB is 90 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 2.0.0 — 2026-11-04

B737 CB 2.0 is rebuilt from the ground up as a native app for iPhone, iPad and Mac.

• Interactive panel diagrams: zoom in, select any knob, and see where the panel is on the aeroplane
• Search by name, abbreviation, position (P6-2 C3), ATA chapter, power bus or CB number, with typo tolerance
• Every CB in detail: ATA chapter, power bus, CB number, rating, effectivity and notes
• CB Tracker for CBs pulled or marked during maintenance or under the MEL
• Your own CBs, favourites and notes, with iCloud sync
• Siri, Shortcuts, Spotlight and Handoff
• Revised and expanded 737 NG data
• New: the 737 MAX, with the 737 MAX Pack, a one-time in-app purchase
• A native Mac app, and more than 40 languages

### 1.0 — 2019-01-31

No release notes.

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## More apps by Vecihi LLC

- [Time { + - x ÷ } Calculator](https://appshunter.io/ios/app/time-plus-x-calculator/id1545823975)
- [Speak-Aid](https://appshunter.io/ios/app/speak-aid/id6478109361)

All apps by Vecihi LLC: https://appshunter.io/developer/1448838179

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-13.*