# SDR ASAA2022040738110

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 7, 2022
- Submitted: April 25, 2022
- Operation: Air carrier
- Aircraft: [N440AS](https://openairdocs.org/aircraft/N440AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41705
- Aircraft time: 31,581 hours, 10,066 cycles
- System (JASC): [7600 · Engine Controls](https://openairdocs.org/jasc/7600)
- Part: Brake Assy
- Part number: 254A12905
- Condition: Faulty
- Location: Flight Deck
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022040738110

## Discrepancy

REF T/C 78273000 ENG 1 SHOWS LONG TIME FAULT 76-31361 THE START LEVER SIGNALS DISAGREE. GROUNDED - YES. 450 FH LONG TIME FAULT DEFERRED TO PLT PER T/C 78273000. REPLACED #1 START BRAKE ASSY B737-900 AMM 76-11-10-420-801 UP TO STEP (H) ASSY TEST. PERFORMED ENGINE START BRAKE ASSEMBLY TEST IAW AMM 76-11-10-420-801-F00, STEP H. GROUND VERIFICATION TESTS SUCCESSFUL. RAN #1 ENGINE, VERIFIED FAULT 76-31361 WAS NOT PRESENT ON LAST LEG.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.