SDR 99ZZZX3611

Service difficulty report · Transponder · Cessna 421C

Difficulty date
August 1, 1999
Submitted
March 26, 2000
Operation
General aviation
Aircraft
N510DB
Make and model
Cessna 421C
Aircraft serial
421C0063
Part
Transponder
Condition
Intermittent
Location
Cockpit
Stage of operation
IN
Nature of condition
O
Precautionary procedure
K

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

What was found

REMOVED KXP 755 TRANSPONDER FROM AIRCRAFT. FOUND RECEIVER INTERMITTENT, FOUND BURST CLOCK TOO LONG, CHANGED COIL AND ASSOCIATED PARTS, FOUND POWER OUTAGE ONLY 10 WATTS, AND FREQUENCY UNRECOGNIZABLE. SWAPPED CAVITIES AND FOUND LOWER SUPPLY TOO LOW, TREAD PROBLEM TO BAD TRANSFORMER. REMOVED AND REPLACED. ALIGNED UNIT AND BURN TESTED ON BENCH 8 HRS. CHECKED ALIGNMENT, UNIT TESTED TO MFG'S SPECS.

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