Visual Inspection of the RAT Blades (Aluminum Blades)

TASK 29-22-00-210-001-A
Visual Inspection of the RAT Blades (Aluminum Blades)

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 TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO 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.

WARNING: MAKE SURE THAT THE RAT TRAVEL RANGE IS CLEAR BEFORE YOU EXTEND/RETRACT THE RAT.

CAUTION: MAKE SURE THAT THE ACTUATOR AND THE ENGINE PUMP FIRE VALVE TOUCH ACROSS THEIR FULL SURFACES AND CORRECTLY CONNECT WITH :

THE DRIVE SHAFT OF THE ACTUATOR ENGAGED IN THE COUPLING OF THE ENGINE PUMP FIRE VALVE
THE DOWEL PIN IN THE ADAPTOR PLATE ENGAGED WITH THE HOLE IN THE ACTUATOR ASSEMBLY.

FIN: 2GE

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	2	WARNING NOTICE(S)

B. Referenced Information

REFERENCE	DESIGNATION
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-00-00-910-002-A	Safety Procedures of the Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-22-00-300-001-A	Repair of the Blades of the Ram Air Turbine
TASK 29-22-00-869-005-A	Extension of the Ram Air Turbine (RAT) on the Ground
TASK 29-22-00-869-006-A	Retraction of the Ram Air Turbine (RAT) on the Ground
TASK 29-22-51-000-010-A	Removal of the Ram Air Turbine
TASK 29-22-51-400-010-A	Installation of the Ram Air Turbine
CMM 292144
CMM 292144	(for corrective action)
RAT Blades - Zoning for Damage Limits

3. Job Set-up
Subtask 29-22-00-860-123-B

A. Aircraft Maintenance Configuration

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(2) Put the SAFETY BARRIER(S) in position.
(3) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the Blue hydraulic system:

In the cockpit on the hydraulic section 40VU of the overhead panel,
On the ground service panel of the Blue hydraulic system.

(4) Depressurize the Blue hydraulic system and put it in the maintenance configuration (Ref. AMM TASK 29-00-00-864-001).
(5) Depressurize the reservoir of the Blue hydraulic system (Ref. AMM TASK 29-14-00-614-001).

WARNING: MAKE SURE THAT THE RAT TRAVEL RANGE IS CLEAR BEFORE YOU EXTEND/RETRACT THE RAT.

(6) Extend the RAT (Ref. AMM TASK 29-22-00-869-005).
(7) Put the warning notices in position to tell persons not to operate the RAT:

on the overhead panels 21VU and 40VU.

Subtask 29-22-00-865-123-A

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	HYD/RAT/CTL	2801GE	D14
** ON A/C NOT FOR ALL
49VU	HYD/RAT/CTL	2801GE	B13
** ON A/C ALL
106VU	CSM/G /EV/MAN/SPLY	6XE	B04
121VU	HYDRAULIC/RAT/SPLY/EXTN/SOL1	2803GE	P33

4. Procedure
Subtask 29-22-00-210-083-B

A. Visual Inspection of the RAT
(1) Examine the RAT and its related components for:

cracks,
corrosion,
other types of damage.

(2) Make sure that the RAT and its related components are correctly attached.
(3) Turn the turbine blades manually and make sure that they turn freely.
(4) Examine the aluminum RAT blades for damage:
(a) If you find cracks, replace the RAT (Ref. AMM TASK 29-22-51-000-010) and (Ref. AMM TASK 29-22-51-400-010).
(b) If you find corrosion or other types of damage, do the repair, given in the CMM CMM 292144 and/or (Ref. AMM TASK 29-22-00-300-001), or replace the RAT (Ref. AMM TASK 29-22-51-000-010) and (Ref. AMM TASK 29-22-51-400-010).
(5) Examine the threaded cover for damage CMM 292144.
(6) If, after repair or damage removal, the defects are more than the limits given in the subsequent table, you must replace the RAT (Ref. AMM TASK 29-22-51-000-010) and (Ref. AMM TASK 29-22-51-400-010).

Subtask 29-22-00-910-062-B

B. Damage Limits of the RAT Blades (Aluminum Blades)

RAT Blades - Zoning for Damage Limits

NOTE	DESCRIPTION OF THE DAMAGE
< 1 >	A scratch, nick or dent on the faces specified by the dimension 'H' more than 0.020 in. (0.51 mm) deep or 5% of local blade thickness by 0.040 in. (1.02 mm) wide and 1.00 in. (25.4 mm) long, replace the RAT.
< 2 >	A scratch, nick or dent on the leading or trailing edge in the area specified by the dimension 'H' more than 0.060 in. (1.52 mm) deep by 0.040 in. (1.02 mm) wide, replace the RAT.
< 3 >	A scratch, nick or dent on the faces in the area specified by the dimension 'G' but not included in the areas specified by the dimensions 'A', 'B', 'C', 'D' and 'F' more than 0.010 in. (0.25 mm) deep or 5% of local blade thickness by 0.040 in. (1.02 mm) wide and 1.00 in. (25.4 mm) long, replace the RAT.
< 4 >	A scratch, nick or dent on the leading or trailing edge in the area specified by the dimension 'G' more than 0.010 in. (0.25 mm) deep by 0.040 in. (1.02 mm) wide, replace the RAT.
< 5 >	A scratch, nick or dent in the areas specified by the dimensions 'A', 'B', 'C', 'D' and 'F' more than 0.005 in. (0.13 mm) deep by 0.040 in. (1.02 mm) wide and 1.00 in. (25.40 mm) long, replace the RAT. A small difference in the color and the surface finish in these areas is permitted.
< 6 >	A scratch, nick or dent on the leading or trailing edge in the area specified by the dimension 'E' more than 0.020 in. (0.51 mm) deep by 0.040 in. (1.02 mm) wide, replace the RAT.
< 7 >	A scratch, nick or dent on the faces in the area specified by the dimension 'H' but not included in the areas specified by the dimensions 'A', 'B', 'C', 'D' and 'F' more than 0.020 in. (0.51 mm) deep or 5% of local blade thickness by 0.040 in. (1.02 mm) wide and 1.00 in. (25.4 mm) long, replace the RAT.
< 8 >	A scratch, nick, dent or bend in the area specified by the dimension 'J' is permitted, do not replace the RAT.

5. Close-up
Subtask 29-22-00-865-124-A

A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	HYD/RAT/CTL	2801GE	D14
** ON A/C NOT FOR ALL
49VU	HYD/RAT/CTL	2801GE	B13
** ON A/C ALL
106VU	CSM/G /EV/MAN/SPLY	6XE	B04
121VU	HYDRAULIC/RAT/SPLY/EXTN/SOL1	2803GE	P33

Subtask 29-22-00-860-124-B

B. Put the aircraft back to the serviceable condition.
(1) Make sure that the work area is clean and clear of tools and other items.

WARNING: MAKE SURE THAT THE RAT TRAVEL RANGE IS CLEAR BEFORE YOU EXTEND/RETRACT THE RAT.

(2) Retract the RAT (Ref. AMM TASK 29-22-00-869-006).
(3) Remove the safety barriers.
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 08:11:07 UTC