# SDR AALA201708159039

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 11, 2017
- Submitted: August 16, 2017
- Operation: Air carrier
- Aircraft: [N926AN](https://openairdocs.org/aircraft/N926AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29527
- Aircraft time: 53,021 hours, 21,332 cycles
- System (JASC): [3441 · Inertial Guidance System](https://openairdocs.org/jasc/3441)
- Part: Adiru
- Part number: HG2050BC02
- Condition: Faulty
- Location: Zone 100
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201708159039

## Discrepancy

THE AIRCRAFT WAS GROUNDED.  JUST AFTER T/O, FO AIRSPEED BEGAN TO DECREASE, ALTITUDE ALSO DIFFERED FROM CA. ACCOMPANIED BY IAS DISAGREE, ALT DISAGREE, ALT EEC - BOTH ENGINES AND SPEED TRIM FAIL ON RECALL (CLEARED WITH MASTER CAUTION).  AN EMERGENCY WAS DECLARED WITH APPROACH.  DURING DESCENT, ACCOMPLISHED QRH PROCEDURES.  AS DESCENT CONTINUED THRU 11,800 FO AIRSPEED AND ALT BEGAN TO RECOVER. FROM 3000 TO LANDING FO AND CA SPEED AND ALT MATCHED.  MAINTENANCE TROUBLESHOT FOS PITOT STATIC SYST.  REPLACED RT ADIRU IAW AMM 34-21-01.  FLUSHED PITOT AND STATIC LINES IAW MM 34-11-00.  RIGHT STATIC SYSTEM FULL RANGE LEAK TEST & PITOT ALSO.  (SEE ALSO SDR AALA201708159024)

---
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.