# SDR AALA20151227005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 27, 2015
- Submitted: December 29, 2015
- Operation: Air carrier
- Aircraft: [N488AA](https://openairdocs.org/aircraft/N488AA), registered now
- Make and model: Doug DC-9-82
- Registry model: [Doug DC-9-82](https://openairdocs.org/model/mcdonnell-douglas-dc-9-82) (OpenAirDocs)
- Aircraft serial: 49681
- Aircraft time: 77,248 hours, 40,842 cycles
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Adc
- Part number: HG280D80
- Part serial: 91032586
- Condition: Faulty
- Location: Zone 100
- Part time: 18,549 hours, 9,924 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20151227005

## Discrepancy

AIRCRAFT WAS GNDED.  EMER DECLARED, LANDING UNEVENTFUL & ACFT NOT OVERWEIGHT.  DURING CRUISE 30,000 AUTOPILOT & AUTO THROTTLE DISCONNECTED.  CAPTAIN HAD FAST & SLOW FAIL LIGHT ON MACH TRIM INOPERATIVE & UNRELIABLE AIRSPEED.  R & R NR 1 AIR DATA COMPUTER IAW AMM 34-16-01.  PERFORMED OPERATIONAL TEST IAW AMM 22-01-05.  SYS CHECKED NORMAL.

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