Support & FAQ

737 Tools is built and verified against the Boeing 737 NG. The Classic and MAX share much of the same architecture, so a good part of the content — annunciator lights, circuit breakers, part numbers — carries over closely enough to still be useful as a quick reference, but always confirm against your fleet's official documentation before relying on it, since panel locations, LRUs and procedures can differ between variants. It is an independent app, not affiliated with any manufacturer; the aircraft type is named only to describe what the content refers to.

Five modules. Annunciator Lights: the 737 NG annunciator catalog navigable by ATA chapter, each light with its meaning, associated procedure, fault modes, LRUs involved, related circuit breakers, linked MEL items and your own notes. E/E Tour: a photographic walkthrough of the electrical and electronic compartment with LRU positions marked on real bay photos, plus the circuit breaker panels. Circuit Breakers: search and panel viewer with the exact location. Common PN: frequently used part numbers by zone and category, each with a photo. Damage Reports: field damage reporting with photos, annotations and measurements, exportable to PDF and ZIP.

Line and base maintenance technicians (AMTs / TMAs), maintenance engineers, and Part-66 B1/B2 students studying 737 NG systems. It is designed to be used next to the aircraft: one-handed, with gloves on, and with no signal.

They are separate apps for different aircraft types, from the same developer. A32X Tools covers the Airbus A320 family and A330 Tools the Airbus A330, both built around ECAM resets. 737 Tools is built around the 737 NG annunciator lights, the E/E compartment tour and circuit breaker panels. Each app's technical content is specific to its type.

Yes. All content is embedded in the app, so every module works with no connection at all — on the ramp, in the hangar, or inside the E/E compartment. An internet connection is only used to refresh the Common PN catalog and its images, and to check whether a newer app version is available.

Annunciator lights that have linked MEL items show them directly on the light's page, with a highlighted NO DISPATCH warning where it applies. The calculator takes the date the defect was detected and returns the expiry date for the MEL category. All calculations are done in UTC, not local time.

It is a photographic tour of the electrical and electronic bays. Each bay photo has the position of every LRU marked on top of it, so you can locate a unit before you go down to the E/E compartment. It also includes the circuit breaker panels with the exact position of each CB.

You create a report in the field with photos taken from the camera, annotations, measurements and the location of the damage. The app then generates a PDF or a ZIP that you can send by email or share with any compatible app. No account and no connection required.

Yes. On top of the built-in catalog you can create your own part numbers with photos and notes, and import or export your collection to share it with colleagues.

Yes. One search box queries annunciator lights, LRUs, circuit breakers and part numbers at the same time. The home screen also keeps your recent items for quick access.

A one-time purchase. The app is free to download with part of the content open so you can try it, and Pro is a single payment that unlocks it for life. There is no subscription, no renewal and no recurring fee of any kind.

The complete E/E tour with every bay and every circuit breaker panel, all annunciator light ATA chapters, and unlimited damage reports with PDF and ZIP export.

The free download is the trial: a full slice of the content is open before you pay anything. If you have a question about coverage or a specific feature, email us at info@a32xtools.com and we will answer directly.

Pro is a non-consumable purchase tied to the App Store or Google Play account you bought it with. The transaction is handled entirely by Apple or Google — the app never sees or stores your payment details, and it verifies the unlock locally on the device.

Everything you create — damage reports, your own part numbers, notes, photos and preferences — is stored locally on your device using the platform's standard app storage. There are no user accounts and no server of ours holds your data. See the privacy policy for the full detail.

The app generates a backup file containing your damage reports and your own part numbers. You choose where to save it — iCloud Drive, Google Drive, the Files app, or anywhere else. Once saved, that copy is handled by the service you chose, under its own terms.

No. There are no analytics services, no advertising SDKs, no tracking and no third-party cookies. No advertising profile is built about you, and the app does not track you across apps or websites.

Use the in-app support option. It prepares an email with technical information that helps us diagnose the problem — device model, OS version, app version, screen resolution and the error log stored locally on your device. The message opens in your own email app, so you can read it, edit it or cancel it before sending. Nothing is sent automatically. You can also write to info@a32xtools.com directly. We aim to respond within 2 business days.