# SDR 2002UALA00330

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 1, 2002
- Submitted: April 2, 2002
- Operation: Air carrier
- Aircraft: [N777UA](https://openairdocs.org/aircraft/N777UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26916
- Aircraft time: 28,024 hours, 5,685 cycles
- Engine: Pwa PW4077
- System (JASC): [3420 · Attitude and Direction Data System](https://openairdocs.org/jasc/3420)
- Part: Circuit Card
- Condition: Failed
- Location: Adiru
- Component: Adiru, Honeywell
- Component part number: HG2060AD01
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: J, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2002UALA00330

## Discrepancy

DUMPED FUEL AND DIVERTED TO LHR WITH ADIRU INOP PRIOR TO RVSM/CLASS 2 AIRSPACE.  EICAS STATUS MESSAGES AOA VANE, L STATIC ADM, L PITOT ADM AND ADIRU.  ADIRU REPLACED AND SENT TO HONEYWELL FOR TEST AND REPAIR.  PRELIMINARY FINDINGS SHOW FAILURES ON A8 629 INTERFACE CARD.

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