# SDR ASAA0957169

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 23, 2009
- Submitted: January 14, 2010
- Operation: Air carrier
- Aircraft: [N559AS](https://openairdocs.org/aircraft/N559AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35178
- Aircraft time: 12,517 hours, 3,706 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [3441 · Inertial Guidance System](https://openairdocs.org/jasc/3441)
- Part: Unknown
- Condition: Malfunctioned
- Location: Adiru
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA0957169

## Discrepancy

FOUND MAINT MSG NR 73 31691 (ADIRU 1 AND ADIRU 2 TAT DATA FROM DEU 1 AND DEU 2 IS MISSING) FOR NR 1 ENGINE.  CLASSIFIED AS A LONG TERM FAULT DEFERRED FOR 450 FLT HOURS PER T/C 78273000.  UNABLE TO DUPLICATE.  NO FAULTS LOGGED LAST 10 FLIGHTS.  NO FAULTS ON EITHER ADIRU.  OPS NORMAL.

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