Service difficulty report · Line · Piper PA31350

Difficulty date
October 25, 2000
Submitted
January 19, 2001
Operation
General aviation
Make and model
Piper PA31350
Aircraft time
12,775 hours
Engine
Lyc TIO540J2BD
Part
Line
Part number
LW120980170
Condition
Damaged
Location
Fuel Manifold
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

(CAN) AD 93-02-05 AND LYC SB 342C ADDR BENDING LIMITS FOR FUEL LINE ALONG WITH MEANS OF MINIMIZING HAZARDS OF FUEL LINE DAMAGE. 2 LIMITS LISTED ARE NO BENDS WITHIN 0.69 INCH FROM END AND MIN RADIUS OF 0.62 INCH (.6250 INCH) TO CENTER OF FUEL LINE. WHEN LINE IS BENT TO THESE LIMITS AND INST ON NR 2 CYL, IT COMES WITHIN 0.20 INCH OF COWL, OVERLAPS COWL HALF JOIN BY 0.40 INCH IN VERTICAL PLANE. WITH OVERLAP, TORQUE DEFLECTION OF ENG COULD ALLOW CONTACT OF FUEL LINE TO INNER COWL FLANGE. MINOR DEVIATION FROM SB INSTRUCTIONS WILL ELIMINATE HAZARD. IF BEND STARTS AT 0.69 INCH FROM END AND MIN RADIUS IS REDUCED TO 0.30 INCH, DISTANCE TO INNER COWL IS ACCEPTABLE AND NO DANGER OF CONTACT WITH COWL EXISTS. (X)

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