SusiAir PILATUS PORTER PC6, Maintenance Program

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Form ASI-PC6 Sudden Propeller Stoppage Inspection
Reissued: 2
Revision: 1
Date: July 2020 Page 1 of 4
MAINTENANCE PROGRAM
PILATUS PORTER PC6
Ref. AMM Pilatus Porter PC6 Chapter 05-51-09, EMM PT6A-27 Chapter 72-00-00
PILATUS PC6 - SUDDEN PROPELLER STOPPAGE INSPECTION SHEET
Aircraft
Registration
: ……………. Job Number : …………….
Aircraft S/N : …………….
NO. DESCRIPTION TASK NO. MECH. ENG. RII
PROCEDURE WHEN SUDDEN PROPELLER STOPPAGE OCCURS
1 Remove the power plant access panels. 71-10-00 N/A
2 Remove the propeller and replace or overhaul. 61-10-01
N/A
3
Examine the engine for Propeller sudden stoppage: 72-00-00 N/A
NOTE: 1 Propeller sudden stoppage occurs when propeller rotation stops due to contact (propeller strike)
with a hard object (e.g. ground, ground service equipment, etc).
NOTE: 2 The term propeller strike is used when one of the two occurs. A rotating propeller hits an object which
causes a speed variation (no stoppage) and blade damage, or a stationary propeller is hit by a moving
object which causes blade damage.
a. Remove the power section from service and send it to an approved
P&WC overhaul facility for the inspection required after propeller
sudden stoppage. The inspection must be carried out in accordance
with Overhaul Manual instructions (Ref. Light Overhaul).
N/A
Inspect remainder of engine:
1) Remove and inspect the main oil filter (Ref. 79-20-02, OIL
FILTER, HOUSING AND CHECK VALVE - MAINTENANCE
PRACTICES). If metallic debris is found refer to 72-00-00,
ENGINE, TURBOPROP - FAULT ISOLATION.
79-20-02
72-00-00
N/A
2) Inspect for cracks or distortion at all the engine casings and
housings, mainly at or near the flanges. Remove the starter-
generator and examine all AGB pads and AGB mounted engine
and airframe components for shearing, cracks, distortion or mis-
alignment, and loose/pulled fasteners (Ref. 72-60-00,
ACCESSORY GEARBOX ASSEMBLY - MAINTENANCE
PRACTICES). Examine all the engine mounts (Ref. 72-30-04,
GAS GENERATOR CASE - MAINTENANCE PRACTICES).
72-60-00,
72-30-04
N/A
3) Examine the fireseals for warping or buckling (Ref. 72-30-01,
CENTER FIRESEAL MOUNT RING - MAINTENANCE
PRACTICE and 72-30-02, REAR FIRESEAL MOUNT RING -
MAINTENANCE PRACTICES) and all external tubes for damage
and/or fluid leaks (Ref. 70-00-00, STANDARD PRACTICES -
INSPECTION) or replace as necessary.
72-30-01,
72-30-02,
70-00-00
N/A
4) Check all airframe/engine connections, including fuel inlet and
oil cooler lines, air system, electrical, ignition and indicating
systems, control linkages, and drains.
AMM
N/A
5) Turn the compressor by hand and listen for rubbing, scraping,
interference of rotating components with stationary parts, or
fast/sudden deceleration. Examine the rear accessory case
mounted accessory for drag. Examine for the compressor turbine
tip rub.
72-50-02
N/A
6) As given above, for casing or accessories damage, sign of
electrical discharge, unusual noises that could show damage to
the gears, bearings, seals or rotors, slow compressor acceleration
on start or sudden deceleration on shutdown, remove the
complete engine from service and send it to an approved P&WC
overhaul facility for light overhaul with an applicable document
that show the reason for sudden propeller stoppage and extent of
engine damage.
N/A