Service difficulty report · A/C Pack · Doug DC983

Difficulty date
May 10, 2013
Submitted
May 10, 2013
Operation
Air carrier
Aircraft
N125MN
Make and model
Doug DC983
Aircraft serial
53125
Aircraft time
43,649 hours, 40,268 cycles
Part
A/C Pack
Condition
Overheated
Location
Right
Stage of operation
CR
How discovered
O
Nature of condition
M
Precautionary procedure
A

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

What was found

DURING CLIMB, RT PACK WOULD OVERHEAT AND CYCLE THROUGH THE AUTO SHUTDOWN, NORMAL OPS IN MANUAL MODE. PERFORMED OPS CHECK OF RT PACK TEMP CONTROL-NO DEFECTS NOTED ON GROUND DURING MANUAL OR AUTO OPERATION AMM 21-60-00. DURING FLIGHT AUTOPILOT NR 1 AND NR 2 INOP. PERFORMED RTS ON SYS. NO FAULTS NOTED. OPS CHECKS GOOD ON GROUND MM 22-1000. DURING CRUISE FLIGHT SLATS EXTENDED, FLAPS LL 270 KNOTS THE SPOILER DEPLOYED MESSAGE ON. SPOILER HANDLE VERIFIED STOWED AND A VISUAL INSPECTION VERIFIED SPOILERS IN THE STOWED POSITION. FOUND CAPTIANS A/P DISCONNECT SWITCH ON YOKE STUCK. UNSTUCK SWITCH CLEANED WITH CONTACT CLEANER. RAN RTS ON LAND 2 SIDES NO FAULTS NOTED SYS OPS CHECKS GOOD SWITCH OPERATES WITH NO STICKING, MM 22-10-00.

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