Opening of the Thrust Reverser Doors with One or More Door Opening Actuator(s) Defective [CFMI]

TASK 78-36-00-010-804-A
Opening of the Thrust Reverser Doors with One or More Door Opening Actuator(s) Defective

CAUTION: DO NOT OPEN THE THRUST REVERSER DOORS IF THE WIND SPEED IS MORE THAN 40 KNOTS.

ZONE: 400
FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
To allow the thrust reverser half-doors to be opened if the door opening actuator is defective.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 1M(3 FT)
No specific	AR	WARNING NOTICE(S)
98D27803000000	2	LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION
98D27803500001	2	LOCKING TOOL ZERO POS

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 78-30-00-481-041-A	Make the Thrust Reverser Unserviceable for Maintenance
Thrust-Reverser Door Latches
Hold-Open Rod Installation
Hold-Open Rod Installation
Opening of the Thrust Reverser Half-Door with a Hoist

3. Job Set-up
Subtask 78-36-00-941-056-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Put a WARNING NOTICE(S) in position to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than five minutes before you do this procedure.
(3) On overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 78-36-00-010-073-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(2) Put an ACCESS PLATFORM 1M(3 FT) in position.

Subtask 78-36-00-040-058-A ** ON A/C NOT FOR ALL

C. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).

NOTE: Do not close the fan cowl doors.

4. Procedure
Subtask 78-36-00-010-074-A ** ON A/C NOT FOR ALL

A. Release each of the four door latches of the thrust reverser as follows:

CAUTION: DO NOT OPEN THE THRUST REVERSER DOORS IF THE WIND SPEED IS MORE THAN 40 KNOTS.

(1) Push in on the snap to free the latch handle.

Thrust-Reverser Door Latches ** ON A/C NOT FOR ALL

(2) Pull down on the latch handle to disengage the latch hook from its attachment point.

Subtask 78-36-00-480-054-A ** ON A/C NOT FOR ALL

B. Install the lifting strap on the lower hoist point of the half-door (six o'clock access door).

Opening of the Thrust Reverser Half-Door with a Hoist ** ON A/C NOT FOR ALL

Subtask 78-36-00-480-055-A ** ON A/C NOT FOR ALL

C. Connect the lifting strap to the hoist.

Opening of the Thrust Reverser Half-Door with a Hoist ** ON A/C NOT FOR ALL

Subtask 78-36-00-010-075-A ** ON A/C NOT FOR ALL

D. Opening of the Left or Right Door to the 35-Degree Position (Normal Maintenance Position) or to the 45-Degree Position (Engine Change Position)

NOTE: To open the left or right door to the 35-degree position (normal maintenance position), do step (1).
To open the left or right door to the 45-degree position (engine change position), do step (2).

(1) Open the half-door to the 35-degree position as follows:

Hold-Open Rod Installation ** ON A/C NOT FOR ALL

WARNING: SUDDEN CLOSURE OF HALF DOORS COULD CAUSE SERIOUS INJURY TO PERSONNEL. ALL PERSONNEL MUST BE CLEAR OF AREA UNDER AND BETWEEN HALF DOORS DURING OPENING OR CLOSING OF REVERSER.

(a) Use the hoist to lift the half-door to the 35-degree position.
(b) Attach the Hold Open Rod (HOR) as follows:

WARNING: YOU MUST HOLD EACH HALF DOOR OPENED WITH THE HOLD-OPEN ROD TO PREVENT SERIOUS INJURY DUE TO ACCIDENTAL CLOSURE.

1 Remove the quick-release pin that attaches the HOR to the upper bracket on the adapter ring assembly (FAN CASE).

CAUTION: DO NOT MOVE THE HOLD-OPEN ROD TO THE 45 DEGREE (UPPER) LUG OF THE ATTACHMENT BRACKET ON THE HALF DOOR OR DAMAGE CAN OCCUR.

a Use the quick-release pin to attach the HOR to the 35-degree (LOWER) lug of the attachment bracket on the forward frame of the half-door.
(2) Open the half-door to the 45-degree position (for engine change) as follows:

Hold-Open Rod Installation ** ON A/C NOT FOR ALL

(a) On FLAPS panel 114VU:

WARNING: SUDDEN CLOSURE OF HALF DOORS COULD CAUSE SERIOUS INJURY TO PERSONNEL. ALL PERSONNEL MUST BE CLEAR OF AREA UNDER AND BETWEEN HALF DOORS DURING OPENING OR CLOSING OF REVERSER.

CAUTION: RETRACT WING SLATS BEFORE OPENING THRUST REVERSER OR DAMAGE CAN OCCUR.

1 Make sure that the slat and the flap are in the fully retracted position.
2 Do one of the steps that follow:

Install the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION or the 98D27803500001 LOCKING TOOL ZERO POS on the flap slat lever, or
Put the WARNING NOTICE(S) in position to tell persons not to operate the wing slats.

(b) Use the hoist to lift the half-door to the 45-degree position.
(c) Remove the red bolt and nut from the 45-degree lug of the attachment bracket on the forward frame of the half-door. Temporarily attach the nut to the bolt and tighten it.
(d) Attach the HOR as follows:

WARNING: YOU MUST HOLD EACH HALF DOOR OPENED WITH THE HOLD-OPEN ROD TO PREVENT SERIOUS INJURY DUE TO ACCIDENTAL CLOSURE.

1 Remove the quick-release pin that attaches the HOR to the lower bracket on the adapter ring assembly (FAN CASE).
a Use the quick-release pin to attach the HOR to the 45-degree (UPPER) lug of the attachment bracket on the forward frame of the half-door.

Subtask 78-36-00-010-076-A ** ON A/C NOT FOR ALL

E. On FLAPS panel 114VU:

Hold-Open Rod Installation ** ON A/C NOT FOR ALL

CAUTION: RETRACT WING SLATS BEFORE OPENING THRUST REVERSER OR DAMAGE CAN OCCUR.

(1) Make sure that the slat and the flap are in the fully retracted position.
(2) Do one of the steps that follow:

Install the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION or the 98D27803500001 LOCKING TOOL ZERO POS on the flap slat lever, or
Put the WARNING NOTICE(S) in position to tell persons not to operate the wing slats.

WARNING: SUDDEN CLOSURE OF HALF DOORS COULD CAUSE SERIOUS INJURY TO PERSONNEL. ALL PERSONNEL MUST BE CLEAR OF AREA UNDER AND BETWEEN HALF DOORS DURING OPENING OR CLOSING OF REVERSER.

(3) Open the half-door to the 45-degree position.

NOTE: The half-doors must be opened to the 45-degree position for an engine change.

(a) Use the hoist to lift the half-door to the 45-degree position.
(4) Remove the red bolt and nut from the top lug of the HOR attach fitting on the inner cowl. Tighten the nut on the bolt. Tighten the nut on the bolt.
(5) Attach the HOR:

WARNING: YOU MUST HOLD EACH HALF DOOR OPENED WITH THE HOLD-OPEN ROD TO PREVENT SERIOUS INJURY DUE TO ACCIDENTAL CLOSURE.

(a) Remove the quick-release pin retaining the HOR on the lower bracket.
(b) Move the HOR to the attachment bracket of the forward frame.
(c) Attach the HOR with the quick-release pin.

Subtask 78-36-00-080-054-A ** ON A/C NOT FOR ALL

F. Disconnect the lifting strap from the lower hoist point of the half-door.

Opening of the Thrust Reverser Half-Door with a Hoist ** ON A/C NOT FOR ALL

[Rev.10 from 2021] 2026.04.02 06:38:11 UTC