- Difficulty date
- December 5, 2024
- Submitted
- December 6, 2024
- Operation
- Air carrier
- Make and model
- Boeing 737405
- Aircraft serial
- 24271
- Aircraft time
- 69,896 hours, 47,767 cycles
- Part
- Duct
- Part number
- 65515528
- Condition
- Cracked
- Location
- Zone 100
- Stage of operation
- CR
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- B
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FLIGHT LEVEL 350 CABIN ALTITUDE WARNING LIGHT ILLUMINATED, CABIN BEGAN CLIMBING AT 2000 FPM. CABIN ALTITUDE WENT ABOVE 12000 FEET. R&R CONDITIONED AIR CHECK VALVE SENSE LINE IAW B737 AMM 21-61-25. R&R COMPRESSOR OUTLET PNEUMATIC DUCT IAW B737 AMM 36-19-15. PERFORMED THE STANDBY AND AUTOMATIC RATE CHECK IAW B737 AMM 21-31-00, ALL CHECKS GOOD. THIS CLEARS DMI 73200161, PLACARDS REMOVED.