# SDR CALA2026100920236

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 7, 2026
- Submitted: October 9, 2026
- Operation: Air carrier
- Aircraft: [N57864](https://openairdocs.org/aircraft/N57864), registered now
- Make and model: Boeing 757-33N
- Registry model: [Boeing 757-33N](https://openairdocs.org/model/boeing-757-33n) (OpenAirDocs)
- Aircraft serial: 32588
- Aircraft time: 75,067 hours, 23,114 cycles
- Engine: Rroyce RB211535E4
- System (JASC): [7830 · Engine Thrust Reverser](https://openairdocs.org/jasc/7830)
- Part: Switch
- Part number: 254N11848
- Part serial: A4546
- Condition: Faulty
- Location: Thrust Reverser
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026100920236

## Discrepancy

RIGHT REVERSER STOW SIG & RT REVERSER ISOLATION VALE STATUS MESSAGES APPEARED AFTER TAKEOFF.  PERFORMED PSEU BITE FOUND NO ACTIVE FAULTS, ON LEG 00, FOUND 5 FAULTS (RT T/R DEPLOYED AIR 78-34070) (RT T/R AUTO RESTOW AIR 78-34071) (RT T/R STOWED AIR 78-34036) (RT T/R IN TRANSIT AIR 78-36092) (RT T/R NOT LOCKED  AIR 78-36083). PSEU SYSTEM TEST PASSED. IAW FIM 32-09, FAULT TREE 812. WHILE PERFORMING CONTINUITY TEST OF S24 & S26. FOUND S26 NOT SWITCHING TO THE DEPLOY POSITION. S24 OPERATED NORMALLY IAW AMM 22-32-04, FOLLOWED FIM 78-36 FAULT TREE 811 THROUGH BLOCK 1 REV ISOLATION VALE EICAS MESSAGE WAS SHOWN, 31 NO DEV FAULT ON PSEU, 61 CLEARANCE CHK ON S10105, S10108 CHKD GOOD. PERFORMED IDUCTANCE & RESISTANCE CHK ON S10105, S10108, S164, S166 ALL CHKD GOOD.  LCR METER DIED UNABLE TO CHECK S165, 167. REF SSM 78-36-01-104, 78-34-02-104, FIM 32-09 FAULT TREE 821. PUT AFTC IN AIR MODE TO DUPLICATE FAULT, NO JOY, NO FAULTS INDUCED WHILE MOVING THROTTLE IAW 32-09-02, R & R MICRO SWITCH PACK ASSY IAW AMM 22-32-04.  FOUND S26 OF OUT OF ADJUST, ADJUSTED S26 & PERFORMED THE AUTOTHROTTLE SWITCH PACK TEST IAW AMM 22-32-04. TESTED GOOD. PERFORMED THE PSEU SYSTEM TEST IAW AMM 32-09-04 & RAN T/R MULTIPLE TIMES, NO STATUS FAULT IS DISPLAYED. TESTED GOOD.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.