# SDR CALA2026040115010

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 29, 2026
- Submitted: April 1, 2026
- Operation: Air carrier
- Aircraft: [N27520](https://openairdocs.org/aircraft/N27520), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 64498
- Aircraft time: 17,977 hours, 5,933 cycles
- System (JASC): [2750 · Trailing Edge Flap Control System](https://openairdocs.org/jasc/2750)
- Part: Fseu
- Part number: 285A12005
- Part serial: F08340
- Condition: Faulted
- Location: Flap Sys
- Part time: 17,966 hours, 5,930 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026040115010

## Discrepancy

FMS LIMITING SPEED IN CLIMB AND CRUISE 226/FLAPS IN CLIMB GAVE M AX CAS+MACH IN CRZ CREW DEBRIEF:    FMC ACTED AS THOUGH IT SAW FLAPS NOT FULLY UP IN CLEAN CONFIG. IN CLIMB MODE, 226/FLAPS SHOWED. WHEN SET TO CRUISE SETTING AT LOWER THAN FILED ALT. IT SHOWED MAX CAS/MACH RESTRICTION.  WHEN TRYING TO CLIMB TO FILED ALTITUDE, 226/FLAPS SHOWED AGAIN. ALL PFD & FLAP INDICATIONS NORMAL & SHOWED FULLY RETRACTED. VERIFIED ALT VMO SWITCH IN EE IS SAFTIED IN THE NORMAL POSITION. PERFORMED LAND VERIFY TEST REF AMM 22-11-00-700-801 ALL TESTS PASSED. PERFORMED FSEU BITE CHECK WITH NO FAULTS REF AMM 27-51-00-740-801.  REMOVED AND REPLACED FSEU AS A PRECAUTIONARY IAW AMM 27-51-01. OPS CHECK NORMAL. NO FAULTS FOUND.

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