Service difficulty report · Gearbox · Agusta AW139

Difficulty date
March 15, 2019
Submitted
August 17, 2020
Operation
General aviation
Make and model
Agusta AW139
Aircraft time
3,994 hours
Part
Gearbox
Part number
4G6320A00132
Condition
Making Metal
Location
Main
Part time
2,411 hours
Stage of operation
IN
How discovered
9
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) DEFECT: METAL FLAKES FOUND ON #2 SUMP CHIP PLUG. RECTIFICATION: 1. CHIP PLUGS REMOVED AND CLEANED FROM METAL FLAKES. DUMMY ACTUATOR REMOVED FOR FURTHER INVESTIGATION. 2. LEONARDO PSE DETERMINED METAL FOUND WARRANTED MGB REPLACEMENT. MGB REMOVED AND UNDRESSED AS PER AMP39-B-63-20-00-00A-520A-K, AMP 39-B-63-20-00-00A-521A-K REPLACEMENT MGB BUILT UP AS PER AMP 39-B-63-20-00-00A-721A-K, BOTH MAIN OIL FILTER AND ACCESSORY FILTER REPLACED WITH NEW AS PER AMP 39-A-63-20-05-22A-921A-A, AMP 39-B-63-20-05-42A-921A-K ROTOR BRAKE ASSY INSTALLED ON #1 INPUT SLIDING ADAPTER AS PER AMP 39-A-63-20-05-39B-920A-A. 3. MGB INSTALLED WITH REFERENCE TO AMP 39-B-63-20-00-00A-720A-K STEPS 1 THRU 100 AND STEPS 102 THRU 104 COMPLETED AT THIS TIME. STEP 101 (INSTALLATION OF MR HEAD) AND REMAINING ITEMS 105 THRU 115 STILL TO BE COMPLETED. ICC REQUIRED FOR MGB SERVO FLIGHT CONTROL CONNECTIONS. CRITICAL SYSTEM CHECK REQUIRED FOR MOUNTING INSTALLATION. 4. STEPS 105-115 OF AMP 39-B-63-20-00-00A-720A-K C/O. (TC# 20190318009)

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