Precautionary Measures to be taken during Removal/Installation Operations [CFML]

TASK 70-24-00-910-816-A
Precautionary Measures to be taken during Removal/Installation Operations

1. Reason for the Job
Special care must be taken each time maintenance operations are performed in engine critical areas. Extensive damage can result from foreing objects entering the engine (FOD) or from engine parts that are not properly secured. It is especially important that all critical areas at the engine and its immediate surrounding area be checked for cleanliness before each engine run.
2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TASK 70-24-00-910-817-A	Seals (Preformed Packings and O-rings) and Gaskets

3. Job Set-up
Subtask 70-24-00-869-051-A

A. Not applicable.

4. Procedure
Subtask 70-24-00-869-052-A

A. Engine Critical Areas.
(1) Air inlet cowl.
(2) Bleed valve compartments.
(3) Interfaces with customer bleeds.

Subtask 70-24-00-869-053-A

B. Exposed Hardware Inspection Requirements
(1) It is necessary for an individually licensed technician, or a licensed repair station (if there is no individually licensed technician), to do a visual inspection of all engine parts that can be seen before the engine is assembled again.

Subtask 70-24-00-869-054-A

C. General Precautions.

WARNING: SOME PARTS (MOSTLY LOOP CLAMPS) INSTALLED ON ENGINES MAY CONTAIN SMALL AMOUNTS OF ASBESTOS. THE P/N OF THESE PARTS IS MARKED WITH AN ASTERISK IN THE ALPHA/NUMERIC INDEXES OF THE ENGINE MANUFACTURER'S ILLUSTRATED PARTS CATALOG (IPC). REVIEW THE ENGINE MANUFACTURER'S IPC TO DETERMINE IF PARTS ON YOUR ENGINE ARE AFFECTED. IF YOU REPLACE OR HANDLE THESE PARTS, WEAR APPROPRIATE PERSONAL PROTECTIVE EQUIPMENT AND STRICTLY OBEY ALL APPLICABLE ENVIRONMENTAL CONTROLS AND REGULATIONS FOR HANDLING, REPLACING AND DISPOSING OF ASBESTOS CONTAINING HARDWARE.

(1) Before performing maintenance ensure the following have been accomplished:
(a) Pockets of working clothes have been emptied of their contents.
(b) Soles of footwear are clean.
(c) All critical areas of engine and its immediate surroundings are free of non-essential tools and materials.
(2) After completion of maintenance ensure the following have been accomplished:
(a) All tools and non-installed engine parts are removed.
(b) All clamps and brackets are secured.
(c) All loose wire (instrumentation and lockwire) are removed.
(d) Check that the vicinity of the air inlet cowl, and customer bleeds are clear of any foreign bodies. Use a vacuum cleaner to clean zones difficult to reach.
(e) Check that protective covers are installed.

Subtask 70-24-00-918-052-A

D. Removal of components and accessories.

NOTE: Every protections such as cap or cover installed in order to store the equipment, protect its tapered holes or threads, shall prevent equipment installation on the engine and other hardware assembly without removing these protections.

(1) The practices related to seals are in chapter (Ref. AMM TASK 70-24-00-910-817).
(2) Protect components and accessories againts mechanical contact with metallic tools before removal.
(3) Protect openings with clean covers/caps, as required during removal of a component or accessory.
(4) Protect the electrical connections when electrical systems are disconnected.
(5) Protect all protruding ends such as the gearshafts and connections when removing a components.

Subtask 70-24-00-918-053-A

E. Installation of components and accessories.

CAUTION: USE TWO WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS:

ONE WRENCH TO HOLD THE UNION, AND
ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.

THIS PREVENTS DAMAGE TO THE PARTS.

(1) Record type and serial number before installing a component.
(2) Visually check the general condition of the component and ensure it has not sustained any damage before installation.
(3) Check that mounting faces and seal grooves are clean and not deteriorated.
(4) Use only the tools designed specifically for the operation.
(5) Check that threaded sections protrude by one thread relative to the nuts and chamfers at completion of final torquing.
(6) Comply with all the tightening torque values specified in the relevant sequence of operations.
(7) Use gloves to handle bearings and any other parts prone to oxidation.
(8) Cold shrink installation of bearings (chilling in liquid nitrogen or any other medium) is strictly prohibited.

[Rev.10 from 2021] 2026.04.01 02:20:51 UTC