Adjustment of the FWD Cargo-Compartment Door

TASK 52-31-11-820-001-A
Adjustment of the FWD Cargo-Compartment Door

ZONE: 825

1. Reason for the Job
To adjust the FWD cargo-compartment door immediately after replacement of the door/door components, or if a door malfunction is reported.

NOTE: The values given in this procedure are not applicable for the general inspection/checks

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT)
No specific	Torque wrench: range to between 0.4 and 0.3 m.daN (35.40 and 26.55 lbf.in )
98D52307524000	2	STRUT-SUPPORT,CARGO DOORS

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
825	FORWARD CARGO COMPARTMENT DOOR
825AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 52-30-00-480-001-A	Installation of the Safety Support Equipment
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 52-31-00-720-001-A	Functional Check of Forward Cargo Compartment Door, Comprising Functional Checks of Locking Mechanism, Interlock Mechanism, Drift Pin Mechanism and Safety Mechanism
TASK 52-31-11-000-001-A	Removal of the FWD Cargo-Compartment Door
TASK 52-31-11-400-002-A	Installation of the Forward Cargo-Compartment Door
TASK 52-31-31-000-001-A	Removal of the Stop Bolts
TASK 52-31-31-400-001-A	Installation of the Stop Bolts
TASK 52-31-32-400-001-A	Installation of the Lock Fitting Components
TASK 52-71-00-820-003-A	Adjustment of the Proximity Switches of the Cargo-Compartment Door Threshold
Lateral Clearances - FWD Cargo Door/Fuselage
Skin Offset - FWD Cargo Door/Fuselage ** ON A/C NOT FOR ALL
Skin Offset - FWD Cargo Door/Fuselage ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 52-31-11-010-057-A

A. Get Access

NOTE: You must do the door measurement under the subsequent conditions:

A/C on Landing Gears or Jacks.
Cargo Compartments unloaded.
Fuel Tanks defueled.
Air Condition System depressurized.

(1) Make sure that the FWD cargo compartment door (referred to as cargo door) is correctly closed and locked (Ref. AMM TASK 52-30-00-860-002).
(2) Put the ACCESS PLATFORM 2M (6 FT) in position below the closed cargo door.
(3) Remove the access panel 825AR from the cargo door.

4. Procedure
Subtask 52-31-11-820-051-C

A. Adjustment of the lateral Clearances A thru F

Lateral Clearances - FWD Cargo Door/Fuselage

(1) Measure the lateral clearances A thru F between the cargo door and the door frame.
(2) If these clearances are not in limits, remove the end fitting from the piano hinge area (Ref. AMM TASK 52-31-11-000-001).
(3) Adjust the lateral clearances A thru F between the cargo door and the fuselage as follows:
(a) Measure the clearances J between the heads of the shouldered bushings in the piano hinge halves of the cargo door and the fuselage.
(b) Pull out the hinge pins (1) until the shouldered bushings are free. Install the washers (2), (3), (4) and (5) between FR26 and FR27. Refer to the subsequent table for the selection of the correct washers.

Table for the Selection of the Washers (Item 2 thru Item 5)

CLEARANCE J	ITEM 2	ITEM 3	ITEM 4	ITEM 5	THICKNESS
0.0 mm (0.000 in.) to 0.29 mm (0.011 in.)	-	-	-	-	-
0.3 mm (0.012 in.) to 0.4 mm (0.016 in.)	1	-	-	-	0.3 mm (0.012 in.)
0.4 mm (0.016 in.) to 0.5 mm (0.020 in.)	-	1	-	-	0.4 mm (0.016 in.)
0.5 mm (0.020 in.) to 0.6 mm (0.024 in.)	-	-	1	-	0.5 mm (0.020 in.)
0.6 mm (0.024 in.) to 0.7 mm (0.028 in.)	2	-	-	-	0.6 mm (0.024 in.)
0.7 mm (0.028 in.) to 0.8 mm (0.031 in.)	1	1	-	-	0.7 mm (0.028 in.)
0.8 mm (0.031 in.) to 0.9 mm (0.035 in.)	-	2	-	-	0.8 mm (0.031 in.)
0.9 mm (0.035 in.) to 1.0 mm (0.039 in.)	-	1	1	-	0.9 mm (0.035 in.)
1.0 mm (0.039 in.) to 1.1 mm (0.043 in.)	-	-	2	-	1.0 mm (0.039 in.)
1.1 mm (0.043 in.) to 1.2 mm (0.047 in.)	1	2	-	-	1.1 mm (0.043 in.)
1.2 mm (0.047 in.) to 1.3 mm (0.051 in.)	1	1	1	-	1.2 mm (0.047 in.)
1.3 mm (0.051 in.) to 1.4 mm (0.055 in.)	1	-	2	-	1.3 mm (0.051 in.)
1.4 mm (0.055 in.) to 1.5 mm (0.059 in.)	-	1	2	-	1.4 mm (0.055 in.)
1.5 mm (0.059 in.) to 1.6 mm (0.063 in.)	-	-	3	-	1.5 mm (0.059 in.)
1.6 mm (0.063 in.) to 1.7 mm (0.067 in.)	2	-	2	-	1.6 mm (0.063 in.)
1.7 mm (0.067 in.) to 1.8 mm (0.071 in.)	1	1	2	-	1.7 mm (0.067 in.)
1.8 mm (0.071 in.) to 1.9 mm (0.075 in.)	-	2	2	-	1.8 mm (0.071 in.)
1.9 mm (0.075 in.) to 2.0 mm (0.079 in.)	-	1	3	-	1.9 mm (0.075 in.)
2.0 mm (0.079 in.) to 2.1 mm (0.083 in.)	-	-	-	1	2.0 mm (0.079 in.)
2.1 mm (0.083 in.) to 2.2 mm (0.087 in.)	2	-	3	-	2.1 mm (0.083 in.)
2.2 mm (0.087 in.) to 2.3 mm (0.091 in.)	1	1	3	-	2.2 mm (0.087 in.)
2.3 mm (0.091 in.) to 2.4 mm (0.094 in.)	1	-	-	1	2.3 mm (0.091 in.)
2.4 mm (0.094 in.) to 2.5 mm (0.098 in.)	-	1	-	1	2.4 mm (0.094 in.)
2.5 mm (0.098 in.) to 2.6 mm (0.102 in.)	-	-	1	1	2.5 mm (0.098 in.)
2.6 mm (0.102 in.) to 2.7 mm (0.106 in.)	2	-	-	1	2.6 mm (0.102 in.)
2.7 mm (0.106 in.) to 2.8 mm (0.110 in.)	1	1	-	1	2.7 mm (0.106 in.)
2.8 mm (0.110 in.) to 2.9 mm (0.114 in.)	-	2	-	1	2.8 mm (0.110 in.)
2.9 mm (0.114 in.) to 3.0 mm (0.118 in.)	-	1	1	1	2.9 mm (0.114 in.)

NOTE: The THICKNESS column refers to the total thickness of the applicable washers in mm (in.).

(4) Install the hinge pins (1) again and make sure that the lateral clearances A thru F are correct.
(5) Open the cargo door with the CRANE 200KG (440 LB) until the door opening angle is between 135 and 136 degrees.
(6) Install the 98D52307524000 STRUT-SUPPORT,CARGO DOORS to safety the cargo door in open position (Ref. AMM TASK 52-30-00-480-001).
(7) Install the end fittings to the piano hinge area (Ref. AMM TASK 52-31-11-400-002).

Subtask 52-31-11-820-062-B

B. Adjustment of the Skin Offset

Skin Offset - FWD Cargo Door/Fuselage ** ON A/C NOT FOR ALL

(1) Make sure that the stop bolts (13) do not touch the stop fittings (14) (Ref. AMM TASK 52-31-31-000-001).
(2) Make sure that the latching hooks (3) at FR25 and FR27A touch the rear of the rollers (4).
(3) Measure the skin offsets "H" thru "N" between the external contour of the cargo door and the fuselage contour:

The skin offsets "H" and "J" must be between -0.1 mm (-0.0039 in.) and -3.1 mm (-0.1220 in.)
The skin offsets "K" and "L" must be between -1.5 mm (-0.0591 in.) and -4.5 mm (-0.1772 in.)
The skin offsets "M" and "N" must be between -0.1 mm (-0.0039 in.) and -3.1 mm (-0.1220 in.).

(4) Adjust the skin offsets "M" and "N" as follows:

NOTE: The other skin offsets are related to the limits of the skin offsets "M" and "N".

(a) Remove the nuts (9) and the washers (8) from the special bolt (11).
(b) Remove the serrated plates (2) and (10) from the adjusting bush (5) and the eccentric bolt (1).
(c) Turn the adjusting bush (5) and the eccentric bolt (1) until all the skin offsets are correct.
(d) Install the serrated plates (2) and (10) on the eccentric bolt (1) and the adjusting bush (5).
(e) Make sure that the serrated plates (2) and (10) are correctly installed (Ref. AMM TASK 52-31-32-400-001).
(f) Attach the serrated plates (2) and (10) with the washers (8), the nuts (9) and the special bolts (11) to the door frame fitting (12).
(g) TORQUE the nuts (9) to between 0.4 and 0.3 m.daN (35.40 and 26.55 lbf.in )

.
(5) Make sure that the clearances between the stop fittings (14) and the heads of the stop bolts (13) are between 0.1 mm (0.0039 in.) and 0.5 mm (0.0197 in.) (Ref. AMM TASK 52-31-31-400-001).
(6) Make sure that the clearances between the proximity sensor 30WV and the related target is correctly adjusted (Ref. AMM TASK 52-71-00-820-003).

Subtask 52-31-11-820-061-A

C. Adjustment of the Drift Pins
(1) Open the cargo door (Ref. AMM TASK 52-30-00-860-001) to get access to the fuselage pockets of the drift pins.
(2) Measure the distance X between the external contour of the cargo door to the flat of the drift pin (16).
(3) Measure the distance Y between the outer skin of the fuselage and the plate (17) in the fuselage pockets.
(4) Put shim(s) (15) under the plate (17) until the dimension of the distance Y is the same as the distance X.

NOTE: A tolerance of 0.0 +0.5 mm or -0.0 mm (0.0000 +0.0197 in. or +0.0000 in.) is permitted.

(5) Close the cargo door (Ref. AMM TASK 52-30-00-860-002).

Subtask 52-31-11-220-056-B

D. Dimensional Check
(1) Make sure that the clearances that follow are correct:

Skin Offset - FWD Cargo Door/Fuselage ** ON A/C NOT FOR ALL

Between the latching hooks (3) and the rear of the rollers (4)

NOTE: The permitted clearance between FR25A and FR27 is 0.2 mm (0.0079 in.).
The clearance between the latching hooks (3) and the rear of the rollers (4) at FR25 and FR27A must be zero.

Between the tip of the latching hooks (3) and the rollers (4) at all frames.

NOTE: The clearance must be between 0.8 mm (0.0315 in.) and 1.2 mm (0.0472 in.).

(2) Install the access panel 825AR.
(3) Make sure that the applicable access panel is in line with the fuselage contour of the door sill area.

NOTE: The permitted tolerance of the skin offset is -1.5 mm (-0.0591 in.).

(4) Measure the clearance G between the applicable access panel and the door sill edge of the fuselage.
(5) Make sure that the subsequent clearances are correct when you start to open the cargo door (Ref. AMM TASK 52-31-00-720-001):

Between the latching hooks and the door frame fittings
Between the latching hooks and the door sill.

5. Close-up
Subtask 52-31-11-410-072-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Make sure that the applicable cargo door is correctly closed and locked (Ref. AMM TASK 52-30-00-860-002).

[Rev.10 from 2021] 2026.04.01 04:11:58 UTC