Service difficulty report · Warning Message · Boeing 76734AF

Difficulty date
February 12, 2021
Submitted
February 24, 2021
Operation
Air carrier
Aircraft
N353UP
Make and model
Boeing 76734AF
Aircraft serial
37877
Aircraft time
20,677 hours, 7,435 cycles
Part
Warning Message
Condition
False Indication
Location
Cabin Pressure
Stage of operation
CR
How discovered
O
Nature of condition
N
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

-RAPID DECOMPRESSION -NO EMERG DECLARED-O2 MASKS USED-NO OTHER EMERG EQUIP USED** CABIN ALTTITUDE WARNING AT FL 360 WITH BOTH PACKS ON. RECOVERED CABIN IN AUTO 1 WHEN SELECTED. DEFERRED PER MEL 21-31-1A. BITE TESTED PER FIM 21-31-00-815-803, NO FAULTS FOUND ON #1 OR #2 SYS.PERFORMED AUTOMATIC CABIN PRESS CONTROLLER BITE TEST ON #2 SYS - REF 767 AMM 21-31-00 PRESSURIZATION CONTROL SYS TEST/BITE TEST. NO FAULTS FOUND IN STORED MEMORY. SYS FUNCTIONING NORMALLY PER AMM 21-31-02-404-005 POST INSTALLATION TEST.

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