SDR MALA040571

Service difficulty report · Control Unit · Saab 340B

Difficulty date: September 13, 2004
Submitted: September 23, 2004
Operation: Air carrier
Aircraft: N416XJ
Make and model: Saab 340B
Aircraft serial: 340B416
Aircraft time: 17,752 hours, 19,699 cycles
System (JASC): 2130 · Cabin Pressure Control System
Part: Control Unit
Condition: Malfunctioned
Location: Cabin Pressure
Stage of operation: CR
How discovered: O
Nature of condition: P
Precautionary procedure: O

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

What was found

LOST PRESSURIZATION AT 25,000 FT DESCENDED TO 10,000 FT NOTE CABIN ALTITUDE FOLLOWED TO -1. FOUND C/B G7 POPPED. RESET, SWITCHED TO MANUAL MODE, FOUND IT CONTROLLED PRESSURIZATION SYSTEM. MAINTENANCE REPLACED PRESSURIZATION CONTROL UNIT.

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