Service difficulty report · Governor · Bombdr DHC8402

Difficulty date
April 20, 2012
Submitted
April 24, 2012
Operation
Air carrier
Aircraft
N426QX
Make and model
Bombdr DHC8402
Aircraft serial
4154
Aircraft time
12,454 hours, 13,468 cycles
Part
Governor
Part number
697072003
Part serial
DAP0055
Condition
Failed
Location
Nr 1 Propeller
Part time
11,232 hours, 11,227 cycles
Stage of operation
TX
How discovered
O
Nature of condition
O
Precautionary procedure
O

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

What was found

AFTER START, MOVED CLEVIS OUT OF START/FEATHER AND THE NR 1 ENGINE TOOK 1:50 MINUTES, FIRST TIME TO UNFEATHER AND 0:50 THE 2ND TIME TO UNFEATHER. AFTER SHUTDOWN,THE NR 1 ENGINE PROPELLERS WERE 20 DEG TO 30 DEG OUT OF THE TYPICAL FEATHER POSITION. INTERROGATED CDS, FOUND NO FAULTS. TROUBLESHOT IAW FIM TASK 61-20-00-810-803. R & R NR 1 ENGINE OSG IAW AMM TASK 61-20-26-000-801 AND TASK 61-20-26-400--801. PERFORMED OPS TEST OF THE OSG IAW AMM TASK 61-20-00-710-803. OPS CHECKED GOOD. PERFORMED FEATHER CHECK IAW AMM TASK 71-00-00-868-819. PERFORMED UNFEATHER CHECK OF THE NR 1 PROP IAW AMM TASK 61-20-00-720-8010. UNFEATHER CHECKED GOOD, NO FURTHER DEFECTS NOTED. NO LEAKS NOTED. NR 1 PROP TIME TO UNFEATHER WAS 18 SECONDS, WITHIN LIMITS IAW AMM TASK 61-20-00-720-801. AFTER SHUTDOWN CHECKED PROP, NR 1 PROP WAS FULLY FEATHERED. RETURNED TO SERVICE.