# SDR CALA2026072718035

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 24, 2026
- Submitted: July 27, 2026
- Operation: Air carrier
- Aircraft: [N38424](https://openairdocs.org/aircraft/N38424), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 37095
- Aircraft time: 56,009 hours, 20,126 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Actuator
- Part number: 5416744
- Part serial: 6936
- Condition: Faulted
- Location: Ram Air Door
- Part time: 7,025 hours, 2,893 cycles
- Stage of operation: CR
- 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/CALA2026072718035

## Discrepancy

CABIN TEMP HARD TO CONTROL, BOTH AFT & FWD  RAM DOOR REMAINS OPEN DURING FLT.  ATTEMPTED TO DE-ICE PACKS UNSUCCESSFUL  R & R CABIN TEMP CRTL MODULE. MODULE OPS CHKD GOOD, BUT CABIN TEMP IS NOT SATISFACTORY AT THIS TIME. T/S CONTINUES. IAW AMM 21-61-07.  R & R FWD & AFT CABIN TEMP SENSORS. AFTER CABIN SEEMED TO COOL BETTER THAN BEFORE. REF FIM 21-62, TASK 905, & AMM 21-61-10. OPS CHK OF RAM AIR DOORS FAILED.  DOES NOT CLOSE WHEN ACFT IS ENTERED INTO AIR MODE. RAM AIR DOOR OPS REQUIRES MORE T/S. RAM AIR DOOR T/S IAW 21-51 TASK 803. FLIGHT CREW REPORTED LT RAM AIR DOOR LIGHT ILLUMINATED IN FLT.   FIM 21-51 TASK 803, NO FAULTS FOUND, OPS CHKD & CABIN COOLING GOOD IAW FIM 21-51-TASK 803.  R & R LT RAM AIR ACTUATOR IAW AMM 21-51-21-400-801, OPS CHKD 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.