Service difficulty report · Filter · Bombdr DHC8402

Difficulty date
May 3, 2021
Submitted
May 4, 2021
Operation
Air carrier
Aircraft
N436QX
Make and model
Bombdr DHC8402
Aircraft serial
4236
Aircraft time
27,654 hours, 30,015 cycles
Part
Filter
Part number
P617649
Condition
Not Reported
Stage of operation
CL
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

CLIMBING THROUGH 17000 EXPERIENCED A FLT COMPARTMENT & CABIN DUCT HOT LIGHTS WITH A CABIN PRESS LIGHT. CABIN WOULD NOT PRESSURIZE NORMALLY,(CABIN CLIMBING) RAN DUCT HOT CHECK LIST, TRIED MANUAL PRESSURIZATION TO NO EFFECT, RECYCLED FLT COMPARTMENT PACK SWITCH FROM NORMAL TO OFF TO AUTO AND SYSTEM RESTARED NORMAL PRESSURIZATION FOR REMAINDER OF FLIGHT. REMOVED FROM SERVICE. CDS SHOWS FAULTS 7111 FLT DECK OVER TEMP 1 AND 7114 FD OVR TMP 4 IN FAULT HISTORY. NO CURRENT FAULTS. C/W FIM TASK 21-60-00-810-803. OS TEST OF ECS TEMP CONTROL. TEST GOOD WITH NO FAULTS. CABIN PRESS CAUTION AND PRESSURIZATION ISSUES ARE NORMAL OPERATION WHEN FAULT 7111 FLT DECK OVR TEMP 1. THIS FAULT SHUTS DOWN THE ACM. ECS TEMP CONTROL TEST GOOD WITH NO DEFECTS FOUND. REF AMM 21-61-00-710-803. C/W FIM TASK 21-60-00-810-870 AND 873. REPLACED PACK FLOW CONTROL/SHUT OFF AND FD PACK BYPASS VALVE FILTERS. ECS OPS TEST GOOD. RETURNED TO SERVICE.