# SDR CALA2026010812808

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 6, 2026
- Submitted: January 9, 2026
- Operation: Air carrier
- Aircraft: [N38446](https://openairdocs.org/aircraft/N38446), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 31661
- Aircraft time: 43,336 hours, 15,972 cycles
- System (JASC): [2730 · Elevator Control System](https://openairdocs.org/jasc/2730)
- Part: Computer
- Part number: CA27977003
- Part serial: B0083
- Condition: Faulted
- Location: Zone 300
- Part time: 37,549 hours, 13,555 cycles
- Stage of operation: CR
- 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/CALA2026010812808

## Discrepancy

FEEL DIFF PRESS LIGHT LIGHT ON FEEL DIFF LIGHT ON INFLIGHT WHEN PITCH CHANGES LOCKED LP DUE TO HISTORY. UNLOCKED BY TOMC PERFORMED FIM 27-31 TASK 815. FROM "FAULT ISOLATION PROCEDURE C" (STEP H) TO H(4). ALL CHECKS PASS, NO LEAKS. DUE TO PREVIOUS WRITE UP THAT FOUND CONTAMINATION IN ELEVATOR PITOT RESTRICTOR VALVES, REMOVED BOTH LEFT AND RIGHT VALVES AND REPLACED WITH NEW REF AMM 27-31-17-170-801. REMOVED AND REPLACED ELEVATOR FEEL COMPUTER REF AMM 27-31-37-400/000-801 UP TO AND INCLUDING STEPS 3.G.(11).(B).   INSTALLED ELEVATOR FEEL COMPUTER IAW AMM 27-31-37-400/000-801 FROM STEPS 3.G.(11).(B). UP TO AND INCLUDING 3. G. (11)(G)2)A). ALSO PERFORMED STEPS 3.H. (5)(6) AND (7). COMPLETED ALL REMAINING STEPS OF AMM 27-31-37-400/000-801 REMOVED AND REPLACED ELEVATOR FEEL COMPUTER REF AMM 27-31-37-400/000-801. SYS OPS CHECKED OK

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