# SDR CALA2026091119369

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 10, 2026
- Submitted: September 11, 2026
- Operation: Air carrier
- Aircraft: [N664UA](https://openairdocs.org/aircraft/N664UA), registered now
- Make and model: Boeing 767-300
- Registry model: [Boeing 767-300](https://openairdocs.org/model/boeing-767-300) (OpenAirDocs)
- Aircraft serial: 29236
- Aircraft time: 97,120 hours, 20,016 cycles
- Engine: Pwa PW4060
- System (JASC): [2710 · Aileron Control System](https://openairdocs.org/jasc/2710)
- Part: Pca
- Part number: 2828001009
- Part serial: 2022
- Condition: Faulted
- Location: Lt Aileron
- Stage of operation: CL
- How discovered: O
- Nature of condition: F
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026091119369

## Discrepancy

REPEAT WRITEUP.  LT WING INBD AILERON NOT FULLY STOWED INFLIGHT.  MULTIPLE FLT CONTROL ISSUES ON FINAL DUE TO WINGS HAVING MISMATCHED AILERON POSITIONS & RT WING HAVING TO CORRECT FOR LT WINGS POSITION.   LT INBD AILERON SITTING HIGH IN FLT, ACRT ON RT AUTOPILOT. VERIFIED AILERON SITS HIGH WHEN POWERED BY CTR HYD SYS. BUT SITS FAIRED WHEN POWERED BY LT SYS. CHK RIGGING OF LT INBD AILERON PCU`S MCDP TEST 67 CARRIED OUT, CENTER HYDS CAUSE INBD AILERON TO KICK UP & PCA MAKES LOUD CAVITATING NOISE LT INBD AILERON INBD PCA DISCOVERED TO BE KNOCKING, GETTING VERY WARM DURING OPS. SUSPECT U/S ON FIT PCA.  PCA REMOVED IAW AMM 27-11-48-022-003.  PCA INSTALLED IAW AMM 27-11-48-422-040.  INBD AILERON PCA, OP CHKD IAW AMM 27-11-48-422-040, PARA I. MCDP TESTS 7, 67, & 40, ALSO COMPLETED IAW FIM 22-03-00/101, FAULT TREES 807, 820, & FIM 22-04-00-101 FAULT TREE 814. NO FAULTS FOUND DURING OPS CHKS.

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