ORIGINAL ISSUE: 8th April 2013 32-JM7862 

REVISION 3: 3rd October 2014 PAGE 1 OF 1 

SERVICE BULLETIN

BAE SYSTEMS (OPERATIONS) LIMITED, 

PRESTWICK INTERNATIONAL AIRPORT, 

AYRSHIRE, KA9 2RW, 

SCOTLAND. 

32-JM7862 

TRANSMITTAL SHEET 

This page transmits revision 3 of Service Bulletin 32-JM7862, pages 1 to 16. 

TITLE: LANDING GEAR - INTRODUCTION OF SPECIAL WASHER TO PROTECT THE MAIN 

LANDING GEAR CYLINDER AT THE FORWARD SPIGOT. 

MODIFICATION NUMBER JM7862 

NOTE: Aircraft with modification JM7862 embodied still require to be inspected in accordance with 

SB 32-A-JA851226. 

REASONS FOR ISSUE 

Revision 3 describes improvements to the installation method for the special washer and corrosion 

protection of the MLG cylinder. Editorial. 

Part 1.N - Amended to refer to SB 32-A-JA140940 for landing gear on which this SB has already 

been accomplished. 

Part 2 - Left and Right MLG 

Step 2.B.(7) - Special washer modification instructions added. 

Step 2.B.(8)(c) - Amended to clarify removal of excess gasket material. 

Step 2.B.(8)(d) - New step to describe application of witness paint. 

Step 2.B.(8)(e) - New step to describe protection of exposed surface of forward spigot housing. 

Step 2.B.(11) - New step to check bearing locking pins for signs of wear or damage to heads. 

Part 2.C - Part 2.C deleted as no longer required. Subsequent Parts re-numbered. 

Figure 1 - Amended to show required gap between special washer tab and MLG cylinder flat. 

Figure 2 - New figure showing witness paint application, MLG spigot housing protection and bearing 

locking pin repair. 

Part 3 - Operator supplied materials added. 

FOR ANY LANDING GEAR ON WHICH THIS SERVICE BULLETIN HAS ALREADY BEEN 

ACCOMPLISHED, SB 32-A-JA140940 SHALL ALSO BE ACCOMPLISHED. 

INSTRUCTIONS FOR INCORPORATION 

Remove and discard Service Bulletin at revision 2. 

Insert Service Bulletin at revision 3.

ORIGINAL ISSUE: 8th April 2013 32-JM7862 

REVISION 3: 13th 3rd October 2014 PAGE 1 OF 16 

SERVICE BULLETIN

BAE SYSTEMS (OPERATIONS) LIMITED, 

PRESTWICK INTERNATIONAL AIRPORT, 

AYRSHIRE, KA9 2RW, 

SCOTLAND. 

32-JM7862 

TITLE: LANDING GEAR - INTRODUCTION OF SPECIAL WASHER TO PROTECT THE MAIN 

LANDING GEAR CYLINDER AT THE FORWARD SPIGOT. 

MODIFICATION NUMBER JM7862 

1. PLANNING INFORMATION 

A. Effectivity 

All Jetstream Series 3100 and 3200. 

B. Reason 

On Series 3100 aircraft, which did not have L161 material Main Landing Gear (MLG) 

cylinders (Service Bulletin 32-JA880340) there have been cases of MLG cylinder stress 

corrosion cracking (including failure) originating at the forward face of the cylinder 

around the gear mounting spigot (yoke pintle housing). The protective treatments in this 

area can be damaged by rubbing against the spigot bearing in the gear attachment 

structure in the wing during gear retraction and extension, thereby allowing stress 

corrosion cracking to initiate. 

Although all Series 3200 aircraft have L161 material MLG cylinders, accomplishment of 

this Service Bulletin (SB) additionally includes Series 3200 aircraft. This will reduce 

scrappage rates at overhaul and maintain commonality of parts and installation method 

with Series 3100 aircraft. 

C. Description 

This SB introduces a special washer fitted at the forward spigot on both left and right 

MLGs. The washer is attached to the forward and top faces of the MLG cylinder spigot 

housing using an anaerobically curing, low adhesion, liquid gasket. 

To accommodate the thickness of the new washer, a new spigot split bearing with 

reduced flange thickness is also introduced by this SB. 
SERVICE BULLETIN

32-JM7862 ORIGINAL ISSUE: 8th April 2013 

PAGE 2 REVISION 3: 3rd October 2014 

The tasks are as follows: 

- De-energize aircraft bus-bars. 

- Remove MLG. 

- Remove forward spigot. 

- Inspect (NDT) spigot (pintle) housing for cracks, if applicable. 

- Restore protective treatment, if necessary. 

- Install new special washer. 

- Reinstall forward spigot. 

- Replace forward split bearing. 

- Reinstall MLG and perform functional test. 

- Amend aircraft records. 

- Inform BAE Systems of the accomplishment of this SB. 

D. Manpower 

15 man-hours. 

Mechanical skills are necessary. 

E. Material - Cost and Availability 

Cost and availability is by arrangement between the Operator and BAE SYSTEMS. 

F. Tooling - Price and Availability 

Not applicable. 

G. Weight and Balance 

Not affected. 

H. Aircraft Noise Levels 

Not affected. 

I. Electrical Load Data 

Not affected. 

J. Software Accomplishment Summary 

Not applicable. 

K. References 

- Aircraft Maintenance Manual Chapters 24-00-00, 32-10-11 and 32-30-00. 

- SB 32-A-JA140940. 

- SB 32-A-JA851226. 

- SRM 51-10-31. 

- MLG CMM. 
SERVICE BULLETIN

ORIGINAL ISSUE: 8th April 2013 32-JM7862 

REVISION 3: 3rd October 2014 PAGE 3 

L. Publications Affected 

- Illustrated Parts Catalogue. 

- Aircraft Maintenance Manual. 

Operators are requested to advise:- 

Business Support Team, 

Technical Publications, 

BAE SYSTEMS (Operations) Limited, 

Prestwick International Airport, 

Ayrshire, 

KA9 2RW, 

SCOTLAND, 

of the accomplishment of this SB and request the necessary revisions for the affected 

manuals. 

M. Family Tree Of Modification Relationships 

Not applicable. 

N. Approval 

The technical content of this SB is the subject of EASA Airworthiness Directive 

consultation. 

Compliance with this SB must be achieved as follows:- 

For all aircraft after 31st of July 2013, at the next scheduled removal of the affected MLG 

(left or right). 

NOTE: For Jetstream Series 3100 aircraft that are affected by inspection SB 32-AJA851226, next scheduled MLG removal may be for NDT inspection or overhaul. 

NOTE: For Jetstream Series 3100 aircraft that are not affected by inspection SB 32-AJA851226, next scheduled MLG removal would be for overhaul. 

NOTE: For Jetstream Series 3200 aircraft, next scheduled MLG removal would be for 

overhaul. 

For any landing gear on which this SB has already been accomplished, 

SB 32-A-JA140940 shall also be accomplished. 

The technical content of this SB is approved under the authority of EASA PART 21 

Approval No. EASA.21J.047. 

. 
SERVICE BULLETIN

32-JM7862 ORIGINAL ISSUE: 8th April 2013 

PAGE 4 REVISION 3: 3rd October 2014 

BLANK PAGE 
SERVICE BULLETIN

ORIGINAL ISSUE: 8th April 2013 32-JM7862 

REVISION 3: 3rd October 2014 PAGE 5 

2. ACCOMPLISHMENT INSTRUCTIONS 

INDEPENDENT INSPECTION 

WHENEVER ANY PART OF THE MAIN OR ASSOCIATED SYSTEM IS DISMANTLED, 

ADJUSTED, REPAIRED OR RENEWED, THAT PART OF THE SYSTEM WHICH HAS 

BEEN DISTURBED SHALL BE SUBJECTED TO AN INDEPENDENT INSPECTION FOR 

SECURITY OF LOCKING DEVICES, FULL AND FREE MOVEMENT, DIRECTION AND 

TENSION CHECKS. THIS WORK MUST BE DONE IN ACCORDANCE WITH THE 

ACCEPTABLE MEANS OF COMPLIANCE M.A. 402 (a) TO EASA PART M, OR TO AN 

EQUIVALENT NATIONAL STANDARD. 

WARNING: MAKE SURE THE AIRCRAFT AND THE AIRCRAFT SYSTEMS ARE MADE 

SAFE AS DETAILED IN THE APPLICABLE CHAPTERS OF THE AIRCRAFT 

MAINTENANCE MANUAL. 

WARNING: THE MINIMUM CLEARANCE BETWEEN MOVING AND STRUCTURAL PARTS 

MUST BE 0.2 IN (5.1 MM) UNLESS OTHERWISE STATED. 

CAUTION: TO AVOID DAMAGE, MAKE SURE BEFORE MOVING CONTROLS THAT 

CONTROL RUNS AND CONTROL SURFACES ARE FREE FROM 

OBSTRUCTION. 

CAUTION: TAKE CARE NOT TO DAMAGE STRUCTURE WHEN MATERIAL IS CUT OR 

DRILLED. REMOVE ALL UNWANTED MATERIAL FROM THE WORK AREA. 

CAUTION: IF AN ELECTRICAL CONNECTION OR CONNECTOR IS DISMANTLED, 

ASSEMBLED OR REPLACED, DO A CONTINUITY CHECK AND, IF 

APPLICABLE, A SCREEN BONDING CHECK BEFORE THE ASSEMBLY IS 

CONNECTED TO EQUIPMENT. 

NOTE: Abbreviations used in the accomplishment instructions of this SB are:- 

 AMM - Aircraft Maintenance Manual. 

CMM - Component Maintenance Manual. 

 MLG - Main Landing Gear. 

 NDT - Non Destructive Test. 

SRM - Structural Repair Manual. 

A. Preparation 

(1) Refer to AMM 24-00-00 and de-energize the aircraft bus-bars. 

B. Accomplishment - Use material kit number JM7862 (refer to paragraph 3.A.). 

NOTE: The following accomplishment instructions are in two parts, one for the left 

MLG and the other for the right MLG. Both MLGs do not have to be modified at 

the same time. The modification and SB should only be claimed when both 

MLGs have been modified. 
SERVICE BULLETIN

32-JM7862 ORIGINAL ISSUE: 8th April 2013 

PAGE 6 REVISION 3: 3rd October 2014 

Left MLG 

(1) Refer to AMM 32-10-11, page block 401 and remove the left MLG. 

(2) Locate the forward spigot in the MLG cylinder subassembly and remove as 

follows:- 

(a) Remove and discard split-pin. 

(b) Remove slotted nut, spigot bolt and washer. 

(c) Withdraw forward spigot from cylinder. 

(3) Remove any paint or primer from the forward face of the MLG spigot housing in 

accordance with SRM 51-10-31. 

(4) Refer to SB 32-A-JA851226 and, if applicable, do an NDT inspection of the MLG 

spigot (pintle) housing for cracks. 

(5) Check the condition of the forward face of the MLG spigot housing and, if 

necessary, restore protective treatment using Alocrom (or Alodine) 1200. Do not 

apply primer or paint. 

(6) Refer to figure 1 detail D. Position the special washer p/n 13744B31 over the 

spigot housing bore and mark the inside face of the washer to show the material 

to be removed to enable the washer to match the bottom of the bore. 

(7) Carefully trim material from the bottom inside diameter of the special washer p/n 

13744B31 sufficient to create a gap of 0.002 to 0.005 in. (0.051 to 0.127 mm) 

between the special washer tab and the top flat surface of the MLG spigot 

housing when assembled with the forward spigot pin. Take care not to remove 

excessive material. If the gap is greater than 0.005 in. (0.127 mm), the special 

washer must be discarded. 

(8) Refer to figure 1 and install the special washer p/n 13744B31 as follows:- 

(a) In accordance with the manufacturer’s instructions, apply Loctite 5203 liquid 

gasket to the inside faces of the special washer. 

(b) Clamp the special washer to the forward face of the cylinder whilst the gasket 

cures. 

NOTE: Liquid gasket cure time is 24 hours at 20 deg.C or 30 mins. if hot air not 

exceeding 120 deg.C is applied. It is acceptable to use Loctite 7240 Activator 

in accordance with the manufacturer’s instructions to further reduce curing 

time. 

(c) Remove all visible excess gasket material. The gasket should only be in the 

interface between the MLG and the special washer. 

(d) Refer to figure 2 detail E. Apply a small amount of suitable witness paint 

(such as F-900 Torque Seal or Loctite 7414) over the inboard edge of the 

special washer tab and onto the flat of the MLG spigot housing. 
SERVICE BULLETIN

ORIGINAL ISSUE: 8th April 2013 32-JM7862 

REVISION 3: 3rd October 2014 PAGE 7 

(e) Refer to figure 2 detail G. On DTD5094 cylinders, apply a single coat of 

Tectyl 502-C corrosion prevention compound to the exposed surface on the 

forward spigot housing (i.e. the area treated with Alocrom that is not covered 

by the special washer). Do not apply within the inspection window on the 

special washer tab. 

On L161 cylinders, treat the exposed surface with epoxy primer and 

polyurethane paint topcoat in accordance with the aircraft SRM or MLG CMM. 

NOTE: The following Left Hand landing gear part numbers have cylinders made 

from DTD5094:- 

1863 (without strike off 3), 1863/4A, 1863/4B and 1863/4C (Pre Mod 86-

04-003 Re-issue 6), B00A702850A (without strike off 7 or 16), 

B00A702925A (without strike off 5 or 15). 

All other Left Hand landing gear part numbers (including all Jetstream 

Series 3200 gear types) have cylinders made from L161. 

(9) Reinstall the forward spigot in the MLG cylinder subassembly as follows:- 

(a) Reinstall forward spigot in cylinder subassembly. 

(b) Install spigot bolt, washer and slotted nut, with the slotted nut on the 

retraction side of the cylinder. 

(c) Tighten bolt with a maximum torque of 30 lbf.in. (3.4 Nm) using a suitable 

wrench. 

(d) Lock slotted nut with new split-pin p/n SP90C8.

(e) Coat head and nut of spigot bolt with sealing compound to AMS-S-8802 or 

DTD 900/4502 (PR1422A2). 

(10) Refer to figure 1 and discard the forward split bearing p/n 13744B11 and replace 

with new bearing p/n 13744B29 as shown. 

(11) Check the two bearing locking pins P/N 13744B21 for signs of wear or damage to 

the heads. Worn/damaged heads can be repaired by grinding away the minimum 

amount of material required to achieve a flat surface. Refer to figure 2 detail F, 

ensure that the head of the pin is at least 0.05 in. (1.27 mm) long. If not, replace 

with a serviceable pin. Apply Alocrom (or Alodine) 1200 to the repaired surface. 

(12) Refer to AMM 32-10-11, page block 401 and reinstall the left MLG. 

NOTE: Trunnion/bearing cap to be installed with bearing locking pins on the forward 

side. 
SERVICE BULLETIN

32-JM7862 ORIGINAL ISSUE: 8th April 2013 

PAGE 8 REVISION 3: 3rd October 2014 

Right MLG 

(1) Refer to AMM 32-10-11, page block 401 and remove the right MLG. 

(2) Locate the forward spigot in the MLG cylinder subassembly and remove as 

follows:- 

(a) Remove and discard split-pin. 

(b) Remove slotted nut, spigot bolt and washer. 

(c) Withdraw forward spigot from cylinder. 

(3) Remove any paint or primer from the forward face of the MLG spigot housing in 

accordance with SRM 51-10-31. 

(4) Refer to SB 32-A-JA851226 and, if applicable, do an NDT inspection of the MLG 

spigot (pintle) housing for cracks. 

(5) Check the condition of the forward face of the MLG spigot housing and, if 

necessary, restore protective treatment using Alocrom (or Alodine) 1200. Do not 

apply primer or paint. 

(6) Refer to figure 1 detail D. Position the special washer p/n 13744B31 over the 

spigot housing bore and mark the inside face of the washer to show the material 

to be removed to enable the washer to match the bottom of the bore. 

(7) Carefully trim material from the bottom inside diameter of the special washer p/n 

13744B31 sufficient to create a gap of 0.002 to 0.005 in. (0.051 to 0.127 mm) 

between the special washer tab and the top flat surface of the MLG spigot 

housing when assembled with the forward spigot pin. Take care not to remove 

excessive material. If the gap is greater than 0.005 in. (0.127 mm), the special 

washer must be discarded. 

(8) Refer to figure 1 and install the special washer p/n 13744B31 as follows:- 

(a) In accordance with the manufacturer’s instructions, apply Loctite 5203 liquid 

gasket to the inside faces of the special washer. 

(b) Clamp the special washer to the forward face of the cylinder whilst the gasket 

cures. 

NOTE: Liquid gasket cure time is 24 hours at 20 deg.C or 30 mins. if hot air not 

exceeding 120 deg.C is applied. It is acceptable to use Loctite 7240 Activator 

in accordance with the manufacturer’s instructions to further reduce curing 

time. 

(c) Remove all visible excess gasket material. The gasket should only be in the 

interface between the MLG and the special washer. 

(d) Refer to figure 2 detail E. Apply a small amount of suitable witness paint 

(such as F-900 Torque Seal or Loctite 7414) over the inboard edge of the 

special washer tab and onto the flat of the MLG spigot housing. 
SERVICE BULLETIN

ORIGINAL ISSUE: 8th April 2013 32-JM7862 

REVISION 3: 3rd October 2014 PAGE 9 

(e) Refer to figure 2 detail G. On DTD5094 cylinders, apply a single coat of 

Tectyl 502-C corrosion prevention compound to the exposed surface on the 

forward spigot housing (i.e. the area treated with Alocrom that is not covered 

by the special washer). Do not apply within the inspection window on the 

special washer tab. 

On L161 cylinders, treat the exposed surface with epoxy primer and 

polyurethane paint topcoat in accordance with the aircraft SRM or MLG CMM. 

NOTE: The following Right Hand landing gear part numbers have cylinders 

made from DTD5094:- 

1864 (without strike off 3), 1864/4A, 1864/4B and 1864/4C, (Pre Mod 86-

04-003 Re-issue 6), B00A702851A (without strike off 7 or 16), 

B00A702926A (without strike off 5 or 15). 

All other Right Hand landing gear part numbers (including all Jetstream 

Series 3200 gear types) have cylinders made from L161. 

(9) Reinstall the forward spigot in the MLG cylinder subassembly as follows:- 

(a) Reinstall forward spigot in cylinder subassembly. 

(b) Install spigot bolt, washer and slotted nut, with the slotted nut on the 

retraction side of the cylinder. 

(c) Tighten bolt with a maximum torque of 30 lbf.in. (3.4 Nm) using a suitable 

wrench. 

(d) Lock slotted nut with new split-pin p/n SP90C8.

(e) Coat head and nut of spigot bolt with sealing compound to AMS-S-8802 or 

DTD 900/4502 (PR1422A2). 

(10) Refer to figure 1 and discard the forward split bearing p/n 13744B11 and replace 

with new bearing p/n 13744B29 as shown. 

(11) Check the two bearing locking pins P/N 13744B21 for signs of wear or damage to 

the heads. Worn/damaged heads can be repaired by grinding away the minimum 

amount of material required to achieve a flat surface. Refer to figure 2 detail F, 

ensure that the head of the pin is at least 0.05 in. (1.27 mm) long. If not, replace 

with a serviceable pin. Apply Alocrom (or Alodine) 1200 to the repaired surface. 

(12) Refer to AMM 32-10-11, page block 401 and reinstall the right MLG. 

NOTE: Trunnion/bearing cap to be installed with bearing locking pins on the forward 

side. 
SERVICE BULLETIN

32-JM7862 ORIGINAL ISSUE: 8th April 2013 

PAGE 10 REVISION 3: 3rd October 2014 

C. Testing 

(1) Refer to AMM 32-30-00, page block 201 and do a functional test of the MLG. 

D. Recovery 

(1) Aircraft records:- 

(a) Add SB number “32-JM7862 Left” and/or “32-JM7862 Right” to the aircraft 

records as appropriate. 

(b) When both the left and right MLGs have been modified, add modification 

number JM7862 to the aircraft records. 

(2) Inform BAE Systems of the accomplishment of this SB using the Accomplishment 

Report attached. 

NOTE: Operators are reminded of the necessity to inform:- 

Business Support Team, 

Technical Publications, 

BAE SYSTEMS (Operations) Limited, 

Prestwick International Airport, 

Ayrshire, 

KA9 2RW, 

SCOTLAND, 

of the accomplishment of this SB in order to obtain the necessary revisions for 

the affected manuals, see paragraph 1.L. Publications Affected, of this SB. 
SERVICE BULLETIN

ORIGINAL ISSUE: 8th April 2013 32-JM7862 

REVISION 3: 3rd October 2014 PAGE 11 

Installation of special washer and new bearing. 

FIGURE 1 
SERVICE BULLETIN

32-JM7862 ORIGINAL ISSUE: 8th April 2013 

PAGE 12 REVISION 3: 3rd October 2014 

Witness paint application, spigot housing protection and bearing locking pin repair 

FIGURE 2 
SERVICE BULLETIN

ORIGINAL ISSUE: 8th April 2013 32-JM7862 

REVISION 3: 3rd October 2014 PAGE 13 

3. MATERIAL INFORMATION 

NOTE: The new part numbers shown in paragraph 3.A. are necessary to accomplish this SB 

on one aircraft. Use the material kit number shown to order the parts. 

A. New parts supplied as a material kit - order kit number JM7862. 

New Part No. QTY Keyword Old Part No. 

13744B31 2 Special washer - 

13744B29 2 Bearing 13744B11 

B. Materials required - Operators Supply 

Material No. QTY Keyword 

- A/R Alocrom (or Alodine) 1200 

- A/R Loctite 5203 liquid gasket 

SP90C8 2 Split-pin 

PR1422A2 A/R Sealing compound 

- A/R Tectyl 502-C 

- A/R Epoxy primer 

- A/R Polyurethane paint 

- A/R F-900 Torque Seal 

Alternative 

Loctite 7414 

13744B21 4 Bearing locking pin 
SERVICE BULLETIN

32-JM7862 ORIGINAL ISSUE: 8th April 2013 

PAGE 14 REVISION 3: 3rd October 2014 

BLANK PAGE 
SERVICE BULLETIN

ORIGINAL ISSUE: 8th April 2013 32-JM7862 

REVISION 3: 3rd October 2014 PAGE 15 

4. CONTINUED AIRWORTHINESS 

D. Continued Airworthiness Instructions 

The following information is provided to Operators to permit continued operation of the aircraft 

pending receipt of a formal revision to the relevant aircraft manuals. 

E. Scheduled Maintenance 

(1) Not applicable. 

F. Removal Procedures 

(1) Refer to part 2.B. of this SB. 

NOTE: Removal is the reverse of installation. 

G. Installation Procedures 

(1) Refer to part 2.B. of this SB. 

H. Test Procedures 

(1) Refer to part 2.C. of this SB. 

I. Trouble Shooting 

(1) Not applicable. 
SERVICE BULLETIN

32-JM7862 ORIGINAL ISSUE: 8th April 2013 

PAGE 16 REVISION 3: 3rd October 2014 

BLANK PAGE 
abcd ACCOMPLISHMENT REPORT 

SERVICE BULLETIN NUMBER 32-JM7862 

TITLE: LANDING GEAR - INTRODUCTION OF SPECIAL WASHER TO PROTECT THE MAIN 

LANDING GEAR CYLINDER AT THE FORWARD SPIGOT.

TO: BUSINESS SUPPORT TEAM, 

 TECHNICAL PUBLICATIONS, 

 BAE SYSTEMS (OPERATIONS) LIMITED, 

 PRESTWICK INTERNATIONAL AIRPORT, 

 AYRSHIRE, KA9 2RW, 

 SCOTLAND. 

 Telephone: (01292) 675207 

 Fax: (01292) 675704 

 E-mail: RAPublications@baesystems.com 

PLEASE BE ADVISED THAT THE ABOVE SERVICE BULLETIN HAS BEEN EMBODIED ON 

AIRCRAFT CONSTRUCTORS NUMBER(S): 

WE REQUEST THE APPROPRIATE REVISIONS TO APPLICABLE MANUALS. 

NAME: .................................................................................. 

SIGNED: ............................................................................... 

COMPANY: .......................................................................... 

DATE: .................................................................................. 

SERVICE BULLETIN COMMENTS/FEEDBACK. 

Please report any non-technical comments or inaccuracies regarding this service bulletin to the 

above address.