SDR IPXA2019113049525

Service difficulty report · Warning Message · Boeing 75724APF

Difficulty date: November 30, 2019
Submitted: December 13, 2019
Operation: Air carrier
Aircraft: N405UP
Make and model: Boeing 75724APF
Aircraft serial: 23727
Aircraft time: 33,883 hours, 23,252 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Warning Message
Condition: False Activation
Location: Cabin Pressure
Stage of operation: CL
How discovered: O
Nature of condition: N
Precautionary procedure: A

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

What was found

CLIMBING THRU 28,000' THE CABIN ALT WARNING EICAS WAS RECEIVED. NO OTHER INDICATIONS LEFT PACK WAS OFF AND WE TURNED IT BACK ON. CABIN ALT WAS ACCEPTABLE BELOW 20,000.PER CERT LEAVE BOTH PACKS ON-PERFORMED PRESS DECAY CHECK, OP'S CHECKED NORMAL, BITE CHECK OF BOTH PACK CONTROLLERS, CHECKED GOOD, NO LEAKS DURING DECAY. IAW AMM 31-51-00, 05-51-24 21-31-00 OK FOR SERVICE

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