Rig the Oil Filler Door Latches (PRE AND POST SBN 71-0332) [IAE]

TASK 71-13-14-820-801-A
Rig the Oil Filler Door Latches (PRE AND POST SBN 71-0332)

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

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	WARNING NOTICE(S)
No specific	Torque wrench: range to between 38 and 32 lbf.in (0.43 and 0.36 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-076)	Methyl Ethyl Ketone, Technical grade
(Material No.V02-147)	lockwire
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Referenced Information

REFERENCE	DESIGNATION
TASK 20-11-11-911-001-A	Safetying with Lockwire
TASK 70-23-11-911-013-A	General Torque Tightening Techniques
TASK 71-13-14-010-801-A	Open the Fan Cowl Oil Filler Access Door
TASK 71-13-14-410-801-A	Close the Fan Cowl Oil Filler Access Door
Rig of the Oil Filler Door

3. Job Set-up
Subtask 71-13-14-860-051-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the 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) to tell persons not to energize the FADEC 1(2).

Subtask 71-13-14-010-058-A ** ON A/C NOT FOR ALL

B. Open the oil filler access door (Ref. AMM TASK 71-13-14-010-801).

Subtask 71-13-14-110-061-A ** ON A/C NOT FOR ALL

C. Clean the Oil Filler Door

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

(1) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with the V01-076Methyl Ethyl Ketone, Technical grade to clean the oil filler access door (1) and the latches (4).
(2) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) to dry the area before the cleaning fluid dries.

4. Procedure
Subtask 71-13-14-220-058-A ** ON A/C NOT FOR ALL

A. Do an inspection of the oil filler door latches.
(1) Close the oil filler access door (1) and make sure that the four latches are latched correctly and that the oil filler access door is flush with the fan cowl door (Ref. AMM TASK 71-13-14-410-801). See the sheet 2 of the figure

Rig of the Oil Filler Door ** ON A/C NOT FOR ALL

(2) Do a check of the tension on the trigger of each of the four latches:
(a) Open the latch trigger and measure the tension value on each latch trigger with a digital force measurement instrument (2). See the sheet 3 of the figure

Rig of the Oil Filler Door ** ON A/C NOT FOR ALL

NOTE: Make sure that the tension measurement is done at the correct location on top of the trigger.

NOTE: Make sure that the tension is the maximum value just before the fully closed position. This is to prevent a false tension value that may be measured after the latch clicks into the fully closed position.

(b) Make sure that the tension value on all four latches is between 23 lbf (10.23 daN) and 27 lbf (12.01 daN). If the tension value for one or more latches is not in the permitted range, then go to step 4 B. and rig the oil filler door latches again.
(c) If the tension value on all four latches is in the permitted range then go to step 4 B.(3).

Subtask 71-13-14-820-050-A ** ON A/C NOT FOR ALL

B. Rig the oil filler door latches.
(1) Open the four latches on the oil filler access door (1). See the sheet 4 of the figure

Rig of the Oil Filler Door ** ON A/C NOT FOR ALL

(2) For each latch that needs to be rigged, do the steps that follow:

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

(a) Cut and remove the lockwire that locks the jam nut (3) to the latch (4).
(b) Make sure that the latch mechanism can move freely before you adjust the height of the adjustment screw (5).
(c) Loosen the jam nut (3).
(d) Set the height of the adjustment screw (5) until the tension value on the latch trigger is between 23 lbf (10.23 daN) and 27 lbf (12.01 daN). See the sheet 4 of the figure

Rig of the Oil Filler Door ** ON A/C NOT FOR ALL

(e) Tighten the jam nut (3) with your hand after the adjustment screw (5) is set, to make sure the position does not change when you measure the latch tension.
(f) Close the oil filler access door (1) and make sure that the four latches are latched correctly and that the oil filler access door is flush with the fan cowl door (Ref. AMM TASK 71-13-14-410-801). See the sheet 2 of the figure

Rig of the Oil Filler Door ** ON A/C NOT FOR ALL

(g) Open the latch trigger and measure the tension value on the latch trigger with a digital force measurement instrument (2).
1 Make sure that the tension value is between 23 lbf (10.23 daN) and 27 lbf (12.01 daN). See the sheet 3 of the figure

Rig of the Oil Filler Door ** ON A/C NOT FOR ALL

(h) If the tension is not correct then open the oil filler door and do steps 4B. (2)(c) thru (g) again.

NOTE: Make sure that the tension measurement is done at the correct location on top of the trigger. See the sheet 3 of the figure

Rig of the Oil Filler Door ** ON A/C NOT FOR ALL

NOTE: Make sure that the tension is the maximum value just before the fully closed position. This is to prevent a false tension value that can be measured after the latch clicks to the fully closed position.

NOTE: It is recommended that the mid to upper limit of the specified tension range between 23 lbf (10.23 daN) and 27 lbf (12.01 daN) is applied when you rig the latches as tension may decrease during the rigging process.

(3) Make sure that the oil filler door is closed (Ref. AMM TASK 71-13-14-410-801).
(4) Do a final latch tension check on all four latches and make sure that the tension value is between 23 lbf (10.23 daN) and 27 lbf (12.01 daN).
(a) If one tension is not correct on one of the four latches then open the oil filler door and do steps 4.B.(2)(c) thru (2)(h) again. See the sheet 3 of the figure

Rig of the Oil Filler Door ** ON A/C NOT FOR ALL

NOTE: It is necessary to perform this final check with the oil filler door closed and the four latches correctly latched as well as the fan cowl door closed and latched.

Subtask 71-13-14-220-059-A ** ON A/C NOT FOR ALL

C. Do a check for intermediate latch position. See the sheet 2 of the figure

Rig of the Oil Filler Door ** ON A/C NOT FOR ALL

(1) For each of the four latches do a check to find if there is an intermediate latch position:
(a) Open the latch trigger and lightly push the latch until it is almost closed then release the trigger. The latch must go back to the fully open position.
(b) If the latch goes back to an intermediate position, contact UTAS:
UTAS Aerostructures
850 Lagoon Drive
Chula Vista, CA 91910-2089
ATTN: Chris Newth
E-Mail: christopher.newth@utas.utc.com

Subtask 71-13-14-420-055-A ** ON A/C NOT FOR ALL

D. Safety the jam nuts.
(1) TORQUE the jam nut (3) to between 38 and 32 lbf.in (0.43 and 0.36 m.daN )

for each latch that has been rigged (Ref. AMM TASK 70-23-11-911-013).
(2) Safety the jam nut with lockwire

(a) Safety the jam nut (3) with lockwire (Material No.V02-147) (Ref. AMM TASK 20-11-11-911-001).

5. Close-up
Subtask 71-13-14-410-058-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the oil filler door (Ref. AMM TASK 71-13-14-410-801).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:29:42 UTC