ORIGINAL ISSUE: 8 th April 2013 32-JM7862

REVISION 3: 3 rd 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 WASHE R TO PROTECT THE MAIN LANDING GEAR CYLINDER AT THE FORWARD SPIGOT.

MODIFICATION NUMBER JM7862

NOTE: Aircraft with modification JM7862 embodied st ill require to be inspected in accordance with SB 32-A-JA851226. REASONS FOR ISSUE Revision 3 describes improvements to the installati on method for the special washer and corrosion protection of the MLG cylinder. Editorial. Part 1.N - Amended to refer to SB 32-A-JA140940 f or landing gear on which this SB has already

been accomplished. Part 2 - Left and Right MLG Step 2.B.(7) - Special washer modification instruct ions added. Step 2.B.(8)(c) - Amended to clarify removal of exc ess 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 o f exposed surface of forward spigot housing. Step 2.B.(11) - New step to check bearing locking p ins 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 spe cial washer tab and MLG cylinder flat. Figure 2 - New figure showing witness paint applica tion, 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 ACCOMP LISHED.

INSTRUCTIONS FOR INCORPORATION Remove and discard Service Bulletin at revision 2. Insert Service Bulletin at revision 3.ORIGINAL ISSUE: 8 th April 2013 32-JM7862

REVISION 3: 13 th 3 rd 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 WASHE R 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 ma terial 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 housin g). The protective treatments in this area can be damaged by rubbing against the spigot b earing in the gear attachment structure in the wing during gear retraction and ex tension, thereby allowing stress corrosion cracking to initiate. Although all Series 3200 aircraft have L161 materia l MLG cylinders, accomplishment of this Service Bulletin (SB) additionally includes Se ries 3200 aircraft. This will reduce scrappage rates at overhaul and maintain commonalit y of parts and installation method with Series 3100 aircraft. C. Description This SB introduces a special washer fitted at the f orward 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 n ew spigot split bearing with reduced flange thickness is also introduced by this SB.SERVICE BULLETIN

32-JM7862 ORIGINAL ISSUE: 8 th April 2013 PAGE 2 REVISION 3: 3 rd 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, 3 2-10-11 and 32-30-00. - SB 32-A-JA140940. - SB 32-A-JA851226. - SRM 51-10-31. - MLG CMM.SERVICE BULLETIN

ORIGINAL ISSUE: 8 th April 2013 32-JM7862 REVISION 3: 3 rd 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 ne cessary 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 31 st of July 2013, at the next scheduled removal of the affected MLG (left or right). NOTE: For Jetstream Series 3100 aircraft that are a ffected by inspection SB 32-AJA851226, next scheduled MLG removal may be for NDT inspection or overhaul. NOTE: For Jetstream Series 3100 aircraft that are n ot affected by inspection SB 32-AJA851226, next scheduled MLG removal would be for o verhaul. NOTE: For Jetstream Series 3200 aircraft, next sche duled MLG removal would be for overhaul. For any landing gear on which this SB has already b een 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: 8 th April 2013 PAGE 4 REVISION 3: 3 rd October 2014 BLANK PAGESERVICE BULLETIN

ORIGINAL ISSUE: 8 th April 2013 32-JM7862 REVISION 3: 3 rd 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 SYS TEM 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 ACCORDANC E 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 SY STEMS ARE MADE

SAFE AS DETAILED IN THE APPLICABLE CHAPTERS OF THE AIRCRAFT MAINTENANCE MANUAL.

WARNING: THE MINIMUM CLEARANCE BETWEEN MOVING AND S TRUCTURAL PARTS

MUST BE 0.2 IN (5.1 MM) UNLESS OTHERWISE STATED. CAUTION: TO AVOID DAMAGE, MAKE SURE BEFORE MOVING C ONTROLS THAT

CONTROL RUNS AND CONTROL SURFACES ARE FREE FROM OBSTRUCTION.

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

DRILLED. REMOVE ALL UNWANTED MATERIAL FROM THE WORK AREA.

CAUTION: IF AN ELECTRICAL CONNECTION OR CONNECTOR I S DISMANTLED,

ASSEMBLED OR REPLACED, DO A CONTINUITY CHECK AND, I F APPLICABLE, A SCREEN BONDING CHECK BEFORE THE ASSEM BLY IS CONNECTED TO EQUIPMENT. NOTE: Abbreviations used in the accomplishment inst ructions 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 aircr aft bus-bars. B. Accomplishment - Use material kit number JM7862 (refer to paragraph 3.A.). NOTE: The following accomplishment instructions a re in two parts, one for the left MLG and the other for the right MLG. Both MLGs do n ot 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: 8 th April 2013 PAGE 6 REVISION 3: 3 rd October 2014

Left MLG (1) Refer to AMM 32-10-11, page block 401 and remov e the left MLG. (2) Locate the forward spigot in the MLG cylinder s ubassembly 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 fac e of the MLG spigot housing in accordance with SRM 51-10-31. (4) Refer to SB 32-A-JA851226 and, if applicable, d o 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 Alocr om (or Alodine) 1200. Do not apply primer or paint. (6) Refer to figure 1 detail D. Position the specia l 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 bot tom 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 0.0 05 in. (0.051 to 0.127 mm) between the special washer tab and the top flat sur face 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 0.00 5 in. (0.127 mm), the special washer must be discarded. (8) Refer to figure 1 and install the special washe r p/n 13744B31 as follows:- (a) In accordance with the manufacturer’s instructi ons, 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 de g.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 amoun t of suitable witness paint (such as F-900 Torque Seal or Loctite 7414) over th e inboard edge of the special washer tab and onto the flat of the MLG spi got housing.SERVICE BULLETIN

ORIGINAL ISSUE: 8 th April 2013 32-JM7862 REVISION 3: 3 rd October 2014 PAGE 7

(e) Refer to figure 2 detail G. On DTD5094 cylinder s, apply a single coat of Tectyl 502-C corrosion prevention compound to the e xposed 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 ins pection window on the special washer tab. On L161 cylinders, treat the exposed surface with e poxy primer and polyurethane paint topcoat in accordance with the a ircraft SRM or MLG CMM. NOTE: The following Left Hand landing gear part num bers have cylinders made from DTD5094:- 1863 (without strike off 3), 1863/4A, 1863/4B and 1 863/4C (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 (incl uding all Jetstream Series 3200 gear types) have cylinders made from L1 61. (9) Reinstall the forward spigot in the MLG cylinde r subassembly as follows:- (a) Reinstall forward spigot in cylinder subassembl y. (b) Install spigot bolt, washer and slotted nut, wi th 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 c ompound to AMS-S-8802 or DTD 900/4502 (PR1422A2). (10) Refer to figure 1 and discard the forward spli t bearing p/n 13744B11 and replace with new bearing p/n 13744B29 as shown. (11) Check the two bearing locking pins P/N 13744B2 1 for signs of wear or damage to the heads. Worn/damaged heads can be repaired by gr inding away the minimum amount of material required to achieve a flat surfa ce. 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 rein stall the left MLG. NOTE: Trunnion/bearing cap to be installed with bea ring locking pins on the forward side.SERVICE BULLETIN

32-JM7862 ORIGINAL ISSUE: 8 th April 2013 PAGE 8 REVISION 3: 3 rd October 2014

Right MLG (1) Refer to AMM 32-10-11, page block 401 and remov e the right MLG. (2) Locate the forward spigot in the MLG cylinder s ubassembly 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 fac e of the MLG spigot housing in accordance with SRM 51-10-31. (4) Refer to SB 32-A-JA851226 and, if applicable, d o 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 Alocr om (or Alodine) 1200. Do not apply primer or paint. (6) Refer to figure 1 detail D. Position the specia l 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 bot tom 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 0.0 05 in. (0.051 to 0.127 mm) between the special washer tab and the top flat sur face 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 0.00 5 in. (0.127 mm), the special washer must be discarded. (8) Refer to figure 1 and install the special washe r p/n 13744B31 as follows:- (a) In accordance with the manufacturer’s instructi ons, 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 amoun t of suitable witness paint (such as F-900 Torque Seal or Loctite 7414) over th e inboard edge of the special washer tab and onto the flat of the MLG spi got housing.SERVICE BULLETIN

ORIGINAL ISSUE: 8 th April 2013 32-JM7862 REVISION 3: 3 rd October 2014 PAGE 9

(e) Refer to figure 2 detail G. On DTD5094 cylinder s, apply a single coat of Tectyl 502-C corrosion prevention compound to the e xposed 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 ins pection window on the special washer tab. On L161 cylinders, treat the exposed surface with e poxy primer and polyurethane paint topcoat in accordance with the a ircraft SRM or MLG CMM. NOTE: The following Right Hand landing gear part nu mbers have cylinders made from DTD5094:- 1864 (without strike off 3), 1864/4A, 1864/4B and 1 864/4C, (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 (inc luding all Jetstream Series 3200 gear types) have cylinders made from L1 61. (9) Reinstall the forward spigot in the MLG cylinde r subassembly as follows:- (a) Reinstall forward spigot in cylinder subassembl y. (b) Install spigot bolt, washer and slotted nut, wi th 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 c ompound to AMS-S-8802 or DTD 900/4502 (PR1422A2). (10) Refer to figure 1 and discard the forward spli t bearing p/n 13744B11 and replace with new bearing p/n 13744B29 as shown. (11) Check the two bearing locking pins P/N 13744B2 1 for signs of wear or damage to the heads. Worn/damaged heads can be repaired by gr inding away the minimum amount of material required to achieve a flat surfa ce. 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 rein stall the right MLG. NOTE: Trunnion/bearing cap to be installed with bea ring locking pins on the forward side.SERVICE BULLETIN

32-JM7862 ORIGINAL ISSUE: 8 th April 2013 PAGE 10 REVISION 3: 3 rd 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-JM786 2 Right” to the aircraft records as appropriate. (b) When both the left and right MLGs have been mod ified, add modification number JM7862 to the aircraft records. (2) Inform BAE Systems of the accomplishment of thi s SB using the Accomplishment Report attached. NOTE: Operators are reminded of the necessity to in form:- 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. Publicatio ns Affected, of this SB.SERVICE BULLETIN

ORIGINAL ISSUE: 8 th April 2013 32-JM7862 REVISION 3: 3 rd October 2014 PAGE 11 Installation of special washer and new bearing.

FIGURE 1SERVICE BULLETIN

32-JM7862 ORIGINAL ISSUE: 8 th April 2013 PAGE 12 REVISION 3: 3 rd October 2014 Witness paint application, spigot housing protectio n and bearing locking pin repair FIGURE 2SERVICE BULLETIN

ORIGINAL ISSUE: 8 th April 2013 32-JM7862 REVISION 3: 3 rd 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 pinSERVICE BULLETIN

32-JM7862 ORIGINAL ISSUE: 8 th April 2013 PAGE 14 REVISION 3: 3 rd October 2014 BLANK PAGESERVICE BULLETIN

ORIGINAL ISSUE: 8 th April 2013 32-JM7862 REVISION 3: 3 rd 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 relevan t 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: 8 th April 2013 PAGE 16 REVISION 3: 3 rd October 2014 BLANK PAGE

# abcd ACCOMPLISHMENT REPORT

SERVICE BULLETIN NUMBER 32-JM7862

TITLE: LANDING GEAR - INTRODUCTION OF SPECIAL WASHE R 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 H AS 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 inaccur acies regarding this service bulletin to the above address.