# SDR CALA2026092419783

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 22, 2026
- Submitted: September 24, 2026
- Operation: Air carrier
- Aircraft: [N38473](https://openairdocs.org/aircraft/N38473), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 38702
- Aircraft time: 41,737 hours, 15,250 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [5210 · Passenger/Crew Doors](https://openairdocs.org/jasc/5210)
- Part: Door Seal
- Condition: Leaking
- Location: Zone 800
- Stage of operation: AP
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026092419783

## Discrepancy

PASSING 10K ACFT FAILED TO PRESSURISE,  CABIN ALT INDICATES NEGATIVE IAW DEBRIEF OF CREW.  CREW FLEW UP TO 11,700 FT & STATED THAT THEY NEVER GOT A POSITIVE CABIN ALTITUDE, ALWAYS NEGATIVE.  THE LARGE NEEDLE INDICATED 3, WHILE SMALL NEEDLE INDICATED NEGATIVE,  BTWN 50 & ZERO PSI. PERFORMED BITE OF CABIN PRESSURE CONTROLLER,  NO FAULTS DISPLAYED IAW AMM 21-31-00. PRESSURISATION PANEL WAS LEFT IN AUTO AT ALL TIMES. CREW NEVER GOT AN AUTO FAIL LIGHT.  SINCE THE FLIGHT ALTITUDE  WAS A LITTLE OVER 10,000 FT, IAW 21-00 TASK 807 SUSPECTED LAND ALTITUDE MAY BE INCORRECTLY SET BELOW DEPARTURE FIELD ELEVATION,  PRESSURIZED CABIN IAW AMM 05-51-91 TO 4 PSI, FOUND  BOTTOM OF R1 FLAP SEAL LEAKING, WHICH IS NOTICABLE FROM INSIDE. BELOW 15,000 FT IS NORMAL TO SHOW 0 PSI CABIN PRESSURE IAW SDS 21-30-00-109. SEE REF. FOR R1 DOOR LEAK LOG PAGE 3453645

---
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.