Service difficulty report · Thermostat · Doug MD88

Difficulty date
March 14, 2001
Submitted
April 3, 2002
Operation
Air carrier
Aircraft
N949DL
Make and model
Doug MD88
Aircraft serial
49880
Aircraft time
31,370 hours, 25,290 cycles
Part
Thermostat
Part number
321417611
Part serial
1846
Condition
Failed
Location
Rt Engine
Stage of operation
CL
Nature of condition
O
Precautionary procedure
I

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

What was found

CREW DECLARED EMERGENCY - UNABLE TO MAINTAIN CABIN ALTITUDE WHEN CLIMBING FROM 35K TO 37K WITH FLOW LT ON AND 1200FPM CABIN RATE OF CLIMB- MAX CABIN ALTITUDE WAS 11K. NO MASKS DEPLOYED. AT 10K WITH OUTFLOW VALVE FULLY CLOSED CABIN ALT WAS 1K WITH 4.5PSID MAINTAINED. REPLACED RT AUG VALVE ANTICIPATOR THERMOSTAT

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