Service difficulty report · Shaft · Boeing 757

Difficulty date
January 12, 2021
Submitted
January 12, 2021
Operation
General aviation
Filed by
KC1R265K
Barnes Aerospace, Windsor Airmotive Division
Make and model
Boeing 757
Engine
Rroyce RB211535E4
Engine time
31,795 hours, 11,247 cycles
Part
Shaft
Part number
UL16758
Part serial
DN36575
Condition
Damaged
Location
Stage 1 Ipc
Part time
31,795 hours, 11,247 cycles
Stage of operation
IN
How discovered
D
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

AS RECEIVED, PREVIOUS BLEND ON THE FORWARD FACE OF DOVETAIL CORNER NR 42 (CLOCK POSITION 3:30) IN SLOT FA WAS FOUND. THE BLEND MEASURES APPROXIMATELY 0.450 CIRCUMFERENTIAL LENGTH, 0.100 RADIAL WIDTH, AND 0.084 AXIAL HEIGHT. THERE APPEARS TO BE ONE THROUGH CRACK PRESENT IN THE BLENDED AREA (TWO INDICATIONS BACK TO BACK) THAT MEASURES 0.208 CIRCUMFERENTIAL LENGTH, LOCATED CENTRALLY ON THE DOVETAIL AND 0.050 DOWN AXIALLY. THE DAMAGE IS FREE FROM HIGH SPOTS AND BURRS. THE COMPONENT IS AT PIECE PART LEVEL AND UNDERGOING AN OVERHAUL WORKSCOPE. PART IS CURRENTLY ON HOLD. NOTE: TSN SINCE PREVIOUS REPAIR NOT PROVIDED OR KNOWN. ENGINE TSN AND CSN ALSO NOT KNOWN. ACTUAL CUSTOMER IS ROLLS ROYCE PLC. OUR CUSTOMER IS IBERIA.