# SDR SWAA2024030559386

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 3, 2024
- Submitted: March 5, 2024
- Operation: Air carrier
- Aircraft: N238WN
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 34713
- Aircraft time: 58,635 hours, 35,088 cycles
- System (JASC): [3410 · Flight Environment Data](https://openairdocs.org/jasc/3410)
- Part: Module
- Part number: UNKNOWN
- Condition: Fluctuates
- Location: Air Data
- Stage of operation: CR
- How discovered: 9
- Nature of condition: F, I, O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2024030559386

## Discrepancy

AT FL400 AIRSPEED AND ALTITUDE INDICATIONS BEGAN TO FLUCTUATE AND DISAGREE FLAG. DETERMINED CA SIDE WAS UNRELIABLE/BAD. FO SIDE RELIABLE AND STANDBY RELIABLE. INTERMITTENT ON DESCENT AND ARRIVAL.<[01] R AND R LEFT STATIC AIR DATA MODULE PER AMM 34-21-04. REQUIRES OPERATIONAL TEST;[02] SIGNED IN ERROR;[03] PERFORMED ADIRU BITE; FOUND FAULT CODES 31-65050 & 31-65060. PERFORMED FIM TASK 61-62 TASK 876. R/R CAPT PITOT PROBE REF ?TTGQ00RXGS1?. R/R CAPT STATIC ADM REF?TTG00RXG3N?. REF LOG PAGE 2738310 FOR CAT III RECERTIFICATION

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