## PACIFIC AEROSPACE Pacific Aerospace Umited Au·port Road, Hamilt on Private Bag 3027, Hamilton 3240, New Zealand TEL +64 7 B43 6144 F AX +64 7 843 6134 EMAI L pacific @ aerospace.co .n z WEB www .aerospace.co.nz 

# MANDATORY SERVICE PACSB 

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## X L I 068 ISSUE 3 

## FIN FORWARD PICKUP 

# B 

# u L L 

# E T 1. PLANNING INFORMATION 

### A EFFECTIVITY

B. REASON

C. DESCR I PTION

D . COMPLIANCE

E . TOO LI NG F. WEIGHT AND BALANCE G. REFERENCE H . HOURS REQUIRED Page 1 of 4 1) All PAL 750XL aircraft with greater than 2000 Hours TIS , and ; 2) All PAL 750XL aircraft that are, or have been operated in the agricultural rol e with greater than 1000 Hours TIS. There have been reported instances of cracking in the aft plate of the forward Fin P ickup Lug located at fuse lage STN 337 .00 on 750XL aircraft operated in agricultural and survey roles . Over tightening of the pickup bolt will result in additional loads being applied to the p ickup , which is designed to allow rotation about the aircraft longitudinal axis. An inspection of the fin forward pickup (consisting of P

/N 11-1 0281-1, Qty 2 bonded together) is required to determine if there is any evidence of cracking . If cracking is found the plates are to be replaced . Results of inspections, with the aircraft flight hours and landing cycles are to be forward to Pacific Aerospace Limited. Next 150 Hour scheduled maintenance and thereafter at 600 Hour intervals , or annual inspection (whichever occurs first) . NOTE : Modification PAC/XL/0629 is currently being developed as a product improvement to avoid excessive clamping of the forward fin pickup . This modification will be offered as a retrofit kit which , if implemented , will also extend the 600 hour inspection interval. As required to perform liquid penetrant inspection . No change . Maintenance Manual chapter 55-30-00 . 6 hours. 

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Issued: 29 May 2014

## PACIFIC AEROSPACE

2. ACC OMPLISHMENT IN STRU CTIONS IN S PECTION 

### A. Visuallnspection: 

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## I XL 

## I 068 ISSUE 3

1) Remove the fin (vertical stabilizer) lAW Maintenance Manual chapter 55-30-00 . 2) Carry out a detai led visual inspection of both the forward fin pickup plates for any evidence of cracking . 3) If there is visual evidence of cracking in either of the two fi n forward pickup plates then both plates must be rep laced (refer to para C . below). 4) If no visual evidence of cracking is found carry out liquid penetrant inspection as per para B. below. B. Liqu id Penetrant Inspection : 1) Prepare for a liquid penetrant inspection by removing paint from the external surfaces of the fin forward pickup plates extending above the fuselage . 2) Carry out a liquid penetrant inspection lAW ASTM E1417 (or equival ent approved standard) of the fin forward pickup plates extending above the fuselage for any evidence of cracking . 3) If there is evidence of cracking in either of the two fin forward pickup plates then both plates must be replaced (refer to para C. below) . 4) If no evidence of cracking is found , protect the assembly with paint lAW approved maintenance procedures and install the fin (vertical stabilizer) lAW Maintenance Manua l chapter 55-30-00 . 5) Report the results of the inspections , with the aircraft flight hours and landing cycles to Pacific Aerospace Limited. REPLA CEMENT C. Replacement of Fin Forward Pickup Plates : 1) De-rivet the fin forward pickup plates from Frame STN 337 .00 . 2) Bond the two new fin pickup plates (11-1 0281-1) togethe r with adhesive sealant AMS-S-8802 lAW manufacturer' s instructions, if not already supplied bonded together. 3) Install the two new fin pickup plates to the frame assembly at STN 337 .00 with MS20470AD5 solid rivets . 4) Protect the assembly with paint lAW approved maintenance procedures . NOT E : There is a Bonding Strap (PIN BON-5- 1) fitted between the fin and the fuselage located in close proximity to the forward fin pickup . This bonding strap must be refitted after inspection . 5) I nstall the fin (vertical stabilizer) lAW Maintenance Manual chapter 55-30-00 . Page 2 of 4 Issued: 29 May 2014

## PACIFIC A EROSP A C E

3. CERTIFICATION Record compl iance with this bulletin in the aircraft Log Book . 

### 4. MATERIAL REQUIRED: 

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## I 068 ISSUE 3

If the forward fin pickup is to be replaced then the following parts are requ i red . Contact PAL for parts availability . Desc ription F I N PICKUP- FORWAR D - STN 337 .00 R IVET ADHES IVE SEA L ANT (PRC TYPE)

Issued : 29 May 2014 Part Numb e r 1 1 -10281-1 MS20470AD5 AMS-S-8802 Qty Required 2 10 

### AIR

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## PACIFIC AEROSPACE

I NTE NTIONALLY LEFT BLAN K

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## PACSB I XL I 068 ISSUE 3

Issued : 29 May 2014