SDR 20010208CW014

Service difficulty report · Controller · Piper PA31350

Difficulty date: December 30, 2000
Submitted: February 8, 2001
Operation: Air carrier
Aircraft: N7164D
Make and model: Piper PA31350
Aircraft serial: 318052013
Engine: Lyc TIO540J2BD
System (JASC): 7322 · Fuel Control/Reciprocating Engines
Part: Controller
Part number: LW1684085
Part serial: DDO8226
Condition: Failed
Location: Lt Engine
Stage of operation: IN
How discovered: V
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

AFTER 464.6 HOURS, THIS CONTROLLER SPLIT IN 2 PIECES, RENDERING THIS PART USELESS AND CAUSING BOOST TO FALL OFF IN THE INTAKE MANIFOLD. IT APPEARS THAT DURING MANUFACTURE, THE HOUSING FOR THE SPRING WAS MACHINED TOO DEEP ALLOWING ONLY ABOUT .0312 INCH METAL HOLDING THE PART TOGETHER.

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