# SDR ASMF200607002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 4, 2006
- Submitted: July 7, 2006
- Operation: Air carrier
- Aircraft: N754RA
- Make and model: Doug DC-9-87
- Registry model: [Doug DC-9-87](https://openairdocs.org/model/mcdonnell-douglas-dc-9-87) (OpenAirDocs)
- Aircraft serial: 49641
- Aircraft time: 37,744 hours, 26,150 cycles
- System (JASC): [3411 · Pitot/Static System](https://openairdocs.org/jasc/3411)
- Part: Cadc
- Part number: HG280D80
- Part serial: 732
- Condition: Failed
- Location: Lt Side
- Part time: 11,551 hours, 7,662 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASMF200607002

## Discrepancy

AIRCRAFT RETURNED TO PLATFORM, CADC FAIL WINDSHEAR INOP AND F/D FAIL LIGHTS TURNED ON. DURING MAINTENANCE REVISION, WHEN BOTH AIR DATA SYSTEMS WERE SELECTED TO CADC NR 1 POSITION, THE FAIL DISAPPEARED, BUT WHEN SYSTEMS RETURNED TO NORMAL POSITION, FAILURE APPEARED AGAIN. CADC NR 2 WAS REPLACED, BUT FAIL CONTINUED, THEREFORE, CADC NR 1 WAS REPLACED TOO  IAW MM 34-16-01 AND  TESTS WERE PERFORMED IAW MM 34-11-00, ALL CORRECT.

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