Service difficulty report · Cadc · Doug DC983

Difficulty date
June 27, 2004
Submitted
June 30, 2004
Operation
Air carrier
Aircraft
N583MD
Make and model
Doug DC983
Aircraft serial
49659
Aircraft time
37,112 hours, 28,767 cycles
Engine
Pwa JT8D1
Part
Cadc
Part number
HG280D80
Part serial
88121930
Condition
Failed
Location
Nr 1
Part time
7,675 hours, 4,806 cycles
Stage of operation
CR
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

CAPTAIN REPORTED THAT DURING CRUISE AT 35,000 FEET, VERTICAL VELOCIMETER BAR FD TRI WAS OUT OF SERVICE AND CADC ABNORMAL PROCEDURE WAS PERFORMED. DURING TRANSIT CHECK AT TIJ, PITOTS AND STATIC PORTS WERE CHECKED BY OVERHEAT AND NO DAMAGE WAS DETECTED. PITOTS AND STATIC PORTS WERE DRAINED, CADC CONNECTOR WAS CLEANED AND STATIC CONNECTOR LINE WAS TIGHTENED, TEST CORRECT. DURING TRANSIT CHECK AT MEX, CADC NR 1 WAS REPLACED IAW MM 34-16-01, TEST CORRECT. DURING OVERNIGHT SERVICE, CADC NR 1 TEST WAS PERFORMED IAW MM 34-16-00, ALL CORRECT.

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