Detailed Inspection of the THS Mechanical Control

TASK 27-41-00-210-001-A
Detailed Inspection of the THS Mechanical Control

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.

ZONE: 120
ZONE: 130
ZONE: 150
ZONE: 160
ZONE: 210
ZONE: 220
ZONE: 230
ZONE: 240
ZONE: 310

1. Reason for the Job
Refer to the MPD TASK: 274100-01
DETAILED INSPECTION OF THS MECHANICAL CONTROL
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
120	AVIONICS COMPARTMENT
130	FWD CARGO COMPT AFT BULKHEAD OF AVNCS COMPT TO FWD PRESSURE BULKHEAD OF WING CENTER BOX
150	AFT CARGO COMPARTMENT FWD PRESS BULKHEAD TO AFT BULKHEAD OF AFT CARGO COMPARTMENT
160	BULK CARGO COMPARTMENT AFT BULKHEAD OF AFT CARGO COMPARTMENT TO AFT BULKHEAD OF BULK CARGO COMPARTMENT
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
220	FWD CAB UTILITY AREAS
230	FWD PASSENGER COMPARTMENT
240	MID PASSENGER COMPARTMENT
310	FUSLG TAIL SECTION AFT OF AFT PRESS BHD
312AR, 811, 825, 826

C. Referenced Information

REFERENCE	DESIGNATION
TASK 20-24-11-100-001-A	Cleaning and Protection of the Cables
TASK 20-24-12-200-001-A	Check of the Control Cables
TASK 25-54-12-000-001-A	Removal of the Forward Cargo-Compartment Partition
TASK 25-54-12-000-002-A	Removal of the Ceiling Panels in the Forward Cargo Compartment
TASK 25-54-12-400-001-A	Installation of the Forward Cargo-Compartment Partition
TASK 25-54-12-400-002-A	Installation of the Ceiling Panels in the Forward Cargo Compartment
TASK 25-55-11-000-002-A	Removal of the Ceiling Panels in the Aft Cargo-Compartment - FR47/FR59
TASK 25-55-11-400-002-A	Installation of the Ceiling Panels in the Aft Cargo-Compartment - FR47/FR59
TASK 25-55-12-000-001-A	Removal of the Aft Cargo-Compartment Partition at FR65
TASK 25-55-12-000-002-A	Removal of the Ceiling Panels in the Aft Cargo Compartment at FR59/FR65
TASK 25-55-12-400-001-A	Installation of the Aft Cargo-Compartment Partition at FR65
TASK 25-55-12-400-002-A	Installation of the Ceiling Panels in the Aft Cargo Compartment at FR59/FR65
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-002-A	Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-41-00-010-002-A	Open the Avionics Compartment Doors for Access
TASK 52-41-00-410-002-A	Close the Avionics Compartment Doors after Access
TASK 53-12-11-000-001-A	Removal of the Cockpit Floor Panels from FR1 thru FR12
TASK 53-12-11-400-001-A	Installation of the Cockpit Floor Panels from FR1 thru FR12
TASK 53-12-12-000-001-A	Removal of the Cabin Floor Panels from FR12 thru FR24
TASK 53-12-12-400-001-A	Installation of the Cabin Floor Panels from FR12 thru FR24
TASK 53-22-12-000-001-A	Removal of the Cabin Floor Panels
TASK 53-22-12-400-001-A	Installation of the Cabin Floor Panels
TASK 53-32-12-000-002-A	Removal of the Cabin Floor Panels
TASK 53-32-12-400-002-A	Installation of the Cabin Floor Panels
TASK 06-41-53-00	FUSELAGE-DESCRIPTION AND OPERATION
Visual Inspection of the THS Mechanical Control
Removal/Installation of the Protective Covers

3. Job Set-up
Subtask 27-41-00-010-064-A

A. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) in position at zone 121.
(a) Open forward avionics-compartment door 811 (Ref. AMM TASK 52-41-00-010-002).
(2) Put the ACCESS PLATFORM 2M (6 FT) in position at zone 132.
(a) Open forward cargo-compartment door 825 (Ref. AMM TASK 52-30-00-860-001).
(3) Put the ACCESS PLATFORM 2M (6 FT) in position at zone 154.
(a) Open aft cargo-compartment door 826 (Ref. AMM TASK 52-30-00-860-001).
(4) Put the ACCESS PLATFORM 2M (6 FT) in position at zone 312.
(a) Open access door 312AR.
(5) Remove the panels that follow:

NOTE: Refer to AMM chapter 06 System Description (Ref. AMM D/O 06-41-53-00).

(a) In zones 211 and 221:
1 Remove the cockpit floor panels between frame 8 and frame 12 (FR8 and FR12) (Ref. AMM TASK 53-12-11-000-001).
2 Remove the cabin floor panels between FR12 and FR20 (Ref. AMM TASK 53-12-12-000-001).
(b) In zones 231 and 241:
1 Remove the cabin floor panels between FR20 and FR24 and between FR32 and FR47 (Ref. AMM TASK 53-12-12-000-001), (Ref. AMM TASK 53-22-12-000-001) and (Ref. AMM TASK 53-32-12-000-002).
(c) In zone 131:
1 Remove the ceiling panels between FR24 and FR35 (Ref. AMM TASK 25-54-12-000-002).
2 Remove the forward cargo-compartment partition (Ref. AMM TASK 25-54-12-000-001).
(d) In zones 151 and 161:
1 Remove the ceiling panels between FR47 and FR65 (Ref. AMM TASK 25-55-11-000-002) and (Ref. AMM TASK 25-55-12-000-002).
(e) In zone 161:
1 Remove the aft cargo-compartment partition (Ref. AMM TASK 25-55-12-000-001).

4. Procedure
Subtask 27-41-00-210-050-A

A. Detailed Inspection of the THS Mechanical Control (between FR8 and FR71)
(1) Make sure that all the nuts and the bolts are tight or safetied at each attachment point.
(2) Make sure that there is no corrosion on the bolts, the nuts and the washers.
(3) Make sure that the turnbuckles are safetied with the lock clips.
(4) Make sure that the identification plates of all the components are attached correctly.
(5) Make sure that the front chain and the cable move freely.
(6) Make sure that the front chain and the cable do not touch the structure.
(7) Make sure that the cables are not damaged (Ref. AMM TASK 20-24-12-200-001).
(8) Clean and apply corrosion preventive compound on the cables (Ref. AMM TASK 20-24-11-100-001).

Subtask 27-41-00-210-058-A

B. Detailed Inspection of the Rear THS Control Cable (between FR71 and the THS Actuator)

Removal/Installation of the Protective Covers

(1) Removal of the Protective Covers
(a) Remove the screws (4) and the washers (3).
(b) Release the fasteners (1) and remove the protective covers (2) and (5).
(2) Do an inspection of the THS control cable between the tension regulator and the chain linkage.
(3) Make sure that the chain and the cable move freely.
(4) Make sure that the chain and the cable do not touch the structure (no marks on the fasteners).
(5) Make sure that the chain that controls the THS actuator is in the correct condition.
(6) Make sure that the cables are not damaged (Ref. AMM TASK 20-24-12-200-001).
(7) Clean and apply corrosion preventive compound on the cables (Ref. AMM TASK 20-24-11-100-001).
(8) Installation of the Protective Covers
(a) Install the protective covers (2) and (5).
(b) Tighten the fasteners (1).
(c) Install the washers (3) and the screws (4).

5. Close-up
Subtask 27-41-00-410-059-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the panels that follow:

NOTE: Refer to AMM chapter 06 System Description (Ref. AMM D/O 06-41-53-00).

(a) In zones 211 and 221:
1 Install the cockpit floor panels between FR8 and FR12 (Ref. AMM TASK 53-12-11-400-001).
2 Install the cabin floor panels between FR12 and FR20 (Ref. AMM TASK 53-12-12-400-001).
(b) In zones 231 and 241:
1 Install the cabin floor panels between FR20 and FR24 and between FR32 and FR47 (Ref. AMM TASK 53-12-12-400-001), (Ref. AMM TASK 53-22-12-400-001) and (Ref. AMM TASK 53-32-12-400-002).
(c) In zone 131:
1 Install the ceiling panels between FR24 and FR35 (Ref. AMM TASK 25-54-12-400-002).
2 Install the forward cargo-compartment partition (Ref. AMM TASK 25-54-12-400-001).
(d) In zones 151 and 161:
1 Install the ceiling panels between FR47 and FR65 (Ref. AMM TASK 25-55-11-400-002) and (Ref. AMM TASK 25-55-12-400-002).
(e) In zone 161:
1 Install the aft cargo-compartment partition (Ref. AMM TASK 25-55-12-400-001).
(3) Close access door 312AR.
(4) Close aft cargo-compartment door 826 (Ref. AMM TASK 52-30-00-860-002).
(5) Close forward cargo-compartment door 825 (Ref. AMM TASK 52-30-00-860-002).
(6) Close forward avionics-compartment door 811 (Ref. AMM TASK 52-41-00-410-002).
(7) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 04:23:23 UTC