SDR VJ9800175

Service difficulty report · Pressurization · Boeing 7372L9

Difficulty date: June 2, 1998
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N464AT
Make and model: Boeing 7372L9
Aircraft serial: 21278
System (JASC): 2130 · Cabin Pressure Control System
Part: Pressurization
Condition: Malfunctioned
Location: Cabin
Stage of operation: CR
Nature of condition: O
Precautionary procedure: B

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

What was found

AT CRUISE FL 290 HEARD SMALL POP AND NOTICED CABIN ALTITUDE STARTED TO CLIMB. WENT TO STANDBY AND MANUAL, NO HELP. CABIN STARTED TO CLIMB 4,000 FEET PER MINUTE. EMERGENCY DESCENT ACCOMPLISHED BEFORE CABIN ALTITUDE GOT TO 10,000 FT. PRESSURIZED AIRCRAFT TO 4.5 PSI WITH APU ONLY. COULD NOT DUPLICATE. REF MM 21-31-0.

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