Service difficulty report · Beam · Cessna 402C

Difficulty date
September 25, 2019
Submitted
September 26, 2019
Operation
Air carrier
Aircraft
N494BC
Make and model
Cessna 402C
Aircraft serial
C4020308
Aircraft time
35,416 hours, 20,624 cycles
Part
Beam
Part number
565410412
Condition
Cracked
Location
Rt Nacelle
Part time
35,416 hours, 20,624 cycles
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

DURING MAINTENANCE A CRACK WAS VISUALLY IDENTIFIED ON THE AFT SIDE OF THE RIGHT NACELLE CROSSOVER BEAM (P/N: 5654104-12). THIS CRACK MEASURES APPROXIMATELY 1.302 INCHES IN LENGTH, AND BEGINS AT THE OUTBOARD TURBO BRACKET MOUNTING HOLE ON THE AFT FACE OF THE BEAM. THIS CRACK IS CONSISTENT WITH OTHERS FOUND IN THIS AREA AND IS NOT VISIBLE WITH THE TURBO MOUNTING BRACKET INSTALLED. THIS BEAM WILL BE REMOVED AND REPLACED USING NEW PARTS.

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