# De Havilland Canada Service Bulletin 84-27-75

Copy: No revision named ("DH SB 84-27-75"), 18 pages: PDF https://openairdocs.org/files/sha256/f0/15/f0159c7e26a8752dfc70224a3130910ea63e4bccba28ed2fdea60b75c09aab42; text https://openairdocs.org/service-documents/bombardier/sb-84-27-75/file/f0159c7e26a8.md. Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2022-1653; AD 2023-05-01 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.

## Details

- Manufacturer: [Bombardier](https://openairdocs.org/service-documents/bombardier.md) (issued as De Havilland Canada)
- Type: Service bulletin (Service Bulletin)
- Number: 84-27-75
- Page: https://openairdocs.org/service-documents/bombardier/sb-84-27-75

## ADs that cite it (1) (OpenAirDocs)

Newest first, with the revision each names, as OpenAirDocs read it from the AD's text.

- [AD 2023-05-01](https://openairdocs.org/ad/2023-05-01.md), effective Apr 18, 2023: No revision named

Also cited in [1 proposed AD](https://openairdocs.org/service-documents/bombardier/sb-84-27-75/proposed.md).

## Text (18 pages)

Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2022-1653; AD 2023-05-01 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. Each page's text from the PDF; open the PDF at a page with #page=N.

### Page 1

23 Jun 2022 S.B. 84- 27- 75
MP
Page 1 of 8
SERVICE BULLETIN
ATA SYSTEM: 2752 NUMBER: 84- 27- 75
DE HAVILLAND AIRCRAFT OF CANADA LIMITED (DHC) CONSIDERS
URGES OPERATORS TO PROMPTLY EVALUATE THE CONTENTS
THIS SERVICE BULLETIN TO BE PARTICULARLY SIGNIFICANT AND
SUBJECT: Flight Controls - Flap Power Unit - Pressure Switch Improvement -
ModSum - 4- 114050
1. PLANNING INFORMATION
A. Effectivity
Aircraft Affected:
In- Service: DHC- 8 Aircraft Models 401 and 402 Serial Numbers 4001,
4003- 4633.
Production: ModSum 4- 114050 will be installed before delivery on
applicable DHC- 8 Aircraft at Serial Numbers 4634 and
subsequent.
NOTE: The instructions in this service bulletin are only applicable to the
systems and parts installed at the time of delivery on the aircraft or as
changed by DHC Service Bulletin(s). Before you do this bulletin,
examine all STC or equivalent action changes to make sure this
bulletin can be completed.
DHC PDF Merged Document SB 84-27-75_Jun 23/22 & Collins Aerospace VSB 27-0029_Jun 13/22
Page 1 of 16

### Page 2

SERVICE BULLETIN 84- 27- 75
23 Jun 2022 S.B. 84- 27- 75
MP
Page 2 of 8
Spares Affected:
The following is a list of spares affected by this change. Review spares and
procurement systems to determine the existence of any listed parts. See
Collins Aerospace Service Bulletin 27- 0029, for disposition.
Part Number Description
C148656- 1 Flap Power Unit
C148656- 2 Flap Power Unit
B. Reason
Problem: There have been increasing reports of Flap Power Unit (FPU) pressure
switch failures over the past year leading to a high number of flap
inoperative events.
Cause: Root cause has been determined as a deformation of the pressure switch
internal mechanism due to hydraulic pressure spikes.
Solution: FPU P/N C148656- 1 or C148656- 2 is replaced by C148656- 3
possessing a restrictor insert in the pressure switch inlet.
C. Description
The procedures in this service bulletin give the instructions to do the tasks that follow:
- Aircraft electrical power is removed
- The nose landing gear lock is engaged
- The main landing gear lock pins are installed thru each main gear and main gear door
mechanism
- The FPU is removed from the aircraft and send to the Microtecnica repair facility for
modification or the modification is done in- situ.
- If the modification is done in- situ, then the FPU is re- identified
- If the FPU is removed for modification, it is installed back after modification
- Operational test of the wing flaps is done
- Close out.
DHC PDF Merged Document SB 84-27-75_Jun 23/22 & Collins Aerospace VSB 27-0029_Jun 13/22
Page 2 of 16

### Page 3

SERVICE BULLETIN 84- 27- 75
23 Jun 2022 S.B. 84- 27- 75
MP
Page 3 of 8
D. Compliance
De Havilland Aircraft of Canada Limited highly recommends the accomplishment of
ModSum 4- 114050 at the earliest opportunity unless otherwise directed by the
operator’s airworthiness authority.
A Transport Canada Airworthiness Directive Pending.
E. Approval
The technical content of this service bulletin has been approved under the authority of
the Transport Canada Civil Aviation (TCCA) Design Approval Organization No: DAO
#19- Q- 01.
F. Manpower
Replacement
It will take an estimated 3 man- hours to complete Replacement given in the
ACCOMPLISHMENT instructions in this service bulletin. The breakdown of man -
hours is shown in the table that follows:
TASK MAN- HOURS
Job Set- Up 0.50
Procedure in Part A 1.00
Test / RTS 1.00
Close- Out 0.50
Modification
It will take an estimated 6 man- hours to complete Modification given in the
ACCOMPLISHMENT instructions in this service bulletin. The breakdown of man -
hours is shown in the table that follows:
DHC PDF Merged Document SB 84-27-75_Jun 23/22 & Collins Aerospace VSB 27-0029_Jun 13/22
Page 3 of 16

### Page 4

SERVICE BULLETIN 84- 27- 75
23 Jun 2022 S.B. 84- 27- 75
MP
Page 4 of 8
TASK MAN- HOURS
Job Set- Up 0.50
Procedure in Part B 4.00
Test / RTS 1.00
Close- Out 0.50
G. Material - Price and Availability
Refer to the attached Collins Aerospace Service Bulletin 27- 0029.
H. Tooling - Price and Availability
None
I. Weight and Balance
Negligible weight impact
J. Electrical Load Data
Not affected
K. Publications Affected
Aircraft Illustrated Parts Catalog PSM 1- 84- 4. . . . . . . . . . . . . . . . . . . . .
ModSums Manual PSM 1- 84- 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
L. References
The initial issue of this service bulletin was prepared to the engineering drawings and
related data that follows:
DRAWING SHEET REV
82742146 1 C
VSB 27- 0029 1 -
ModSum 4J114050 Revision ‘B’
ModSum 4Q114050 Revision ‘B’
DHC PDF Merged Document SB 84-27-75_Jun 23/22 & Collins Aerospace VSB 27-0029_Jun 13/22
Page 4 of 16

### Page 5

SERVICE BULLETIN 84- 27- 75
23 Jun 2022 S.B. 84- 27- 75
MP
Page 5 of 8
ModSum 4- 114050 Revision ‘B’
Collins Aerospace Service Bulletin 27- 0029
PCA 48033 Revision 1 (for internal reference only).
2. MATERIAL INFORMATION
A. Parts Required Per Aircraft
Refer to the attached Collins Aerospace Service Bulletin 27- 0029.
B. Parts Required to Modify Spares
Refer to the attached Collins Aerospace Service Bulletin 27- 0029.
C. Special Tools and Equipment Required
None
D. Existing Parts Accountability
Refer to the attached Collins Aerospace Service Bulletin 27- 0029.
3. ACCOMPLISHMENT INSTRUCTIONS
A. Job Set- Up
WARNING: MAKE SURE YOU INSTALL THE LOCKPINS ON THE MAIN LANDING
GEAR. MAKE SURE YOU ENGAGE THE NOSE GEAR LOCK. IF YOU
DO NOT DO THIS, THE LANDING GEAR CAN ACCIDENTALLY
RETRACT. THIS CAN CAUSE INJURIES TO PERSONS AND
DAMAGE TO THE EQUIPMENT.
WARNING: MAKE SURE YOU INSTALL THE LOCKPINS IN THE DOOR
MECHANISMS OF THE MLG AND NLG. THE DOOR MECHANISMS
CAN ACCIDENTALLY CLOSE THE LANDING GEAR DOORS. THIS
CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO THE
EQUIPMENT.
DHC PDF Merged Document SB 84-27-75_Jun 23/22 & Collins Aerospace VSB 27-0029_Jun 13/22
Page 5 of 16

### Page 6

SERVICE BULLETIN 84- 27- 75
23 Jun 2022 S.B. 84- 27- 75
MP
Page 6 of 8
WARNING: MAKE SURE YOU INSTALL THE LOCKPINS ON THE LANDING
GEAR DOORS. MAKE SURE YOU DISCONNECT THE LANDING
GEAR DOORS. IF YOU DO NOT DO THIS THE LANDING GEAR
DOORS WILL CLOSE WHEN YOU APPLY THE HYDRAULIC
PRESSURE. THIS CAN CAUSE INJURIES TO PERSONS AND
DAMAGE TO THE EQUIPMENT.
(1) Obey all the hydraulic safety precautions (refer to AMM TASK
29- 00- 00- 910- 801).
(2) Remove pressure from the hydraulic systems (refer to AMM TASK
29- 00- 00- 863- 802 and TASK 29- 00- 00- 863- 804).
(3) Placard and select all aircraft electrical power to OFF. Obey all relevant
WARNINGS and CAUTIONS (refer to AMM TASK 24- 00- 00- 861- 802 and
TASK 24- 00- 00- 910- 801).
(4) Make sure that lock pins are installed through each main gear and main gear
door mechanism.
(5) Make sure the nose gear ground lock is engaged.
(6) Set wheel chocks in front and behind the landing gear tires.
B. Procedure
NOTE: The replacement of pressure switch may be performed by the operator
in- situ or at the Microtecnica repair facility:
- If the upgrade is performed by the Microtecnica, refer to the procedure at Para.
3.B.(1).
- If the upgrade is performed by operator, refer to procedure at Para.3.B.(2).
(1) Part A: Replacement:
(a) Remove the FPU from the aircraft (refer to AMM TASK 27- 52- 01- 000- 801).
(b) Send the FPU to Microtecnica repair facility for modification (refer to the
attached Collins Aerospace SB 27- 0029).
DHC PDF Merged Document SB 84-27-75_Jun 23/22 & Collins Aerospace VSB 27-0029_Jun 13/22
Page 6 of 16

### Page 7

SERVICE BULLETIN 84- 27- 75
23 Jun 2022 S.B. 84- 27- 75
MP
Page 7 of 8
(c) Install FPU P/N C148656- 3 in the aircraft (refer to AMM TASK
27- 52- 01- 400- 801).
(2) Part B: Modification:
(a) Remove the pressure switch P/N 150135- 1 or 162660- 1 from the FPU (refer to
AMM TASK 27- 52- 01- 000- 802 and the attached Collins Aerospace SB
27- 0029).
(b) Install the new pressure switch P/N 162660- 2 in the FPU (refer to AMM TASK
27- 52- 01- 400- 802 and the attached Collins Aerospace SB 27- 0029).
(c) Re- part mark the FPU as per the attached Collins Aerospace SB 27- 0029,
Para 3.C.1.
C. Close Out
(1) Remove all tools and equipment from the work area.
(2) Do an operational test of the wing flaps per AMM TASK 27- 50- 00- 710- 801.
(3) On incorporation of this ModSum, make an entry that conforms to local
regulatory requirements in the applicable logbook(s). Enter component serial
numbers if applicable. Enter this ModSum number only after complete and
functional incorporation of all work defined in this service bulletin.
DHC PDF Merged Document SB 84-27-75_Jun 23/22 & Collins Aerospace VSB 27-0029_Jun 13/22
Page 7 of 16

### Page 8

SERVICE BULLETIN 84- 27- 75
23 Jun 2022 S.B. 84- 27- 75
MP
Page 8 of 8
This Page Intentionally Blank
1
DHC PDF Merged Document SB 84-27-75_Jun 23/22 & Collins Aerospace VSB 27-0029_Jun 13/22
Page 8 of 16

### Page 9

SERVICE BULLETIN
Basic Issue 
June 13/22 
SB 27-0029
Page 1
CIRCULATE PROMPTLY
PROPRIETARY
Copyright © Collins Aerospace Systems. This document and the information contained herein are the property of Microtecnica S.r.l.. 
Recipient agrees to hold all such information in confidence and agrees it shall be used only for recipient’ s equipment or as may otherwise 
be permitted in an applicable agreement between recipient and Microtecnica S.r.l.. This document and the information contained herein 
shall not be used for any other purpose, including the creation, manufacture, development, or derivation of any repairs, modifications, spare 
parts, design, or configuration changes, or to obtain FAA or any other government or regulatory approval for same. Recipient agrees not to 
disclose such information to any third party, except as may otherwise be provided for in an applicable agreement between recipient and 
Microtecnica S.r.l.. Copying or disclosure of this document and the information contained herein by anyone without Microtecnica S.r.l. prior 
written permission is not authorized and may result in criminal and/or civil liability.
Microtecnica assumes no liability whatsoever, whether contractual, warranty, tort or otherwise, for unauthorized alteration or alterations not 
performed in accordance with Microtecnica S.r.l., approved procedures.
This document does not contain export controlled technology or technical data
IT Export Classification: UNCTD
Copyright (c) 2022,  Collins Aerospace System
 INTRODUCTION OF A NEW PRESSURE SWITCH
FLAP POWER UNIT
MICROTECNICA P/N C148656-1 AND P/N C148656-2
DHC PDF Merged Document SB 84-27-75_Jun 23/22 & Collins Aerospace VSB 27-0029_Jun 13/22
Page 9 of 16

### Page 10

Basic Issue 
June 13/22
SB 27-0029
Page 2 
SERVICE BULLETIN
CIRCULATE PROMPTLY
This document does not contain export controlled 
technology or technical data 
IT Export Classification: UNCTD
1. PLANNING INFORMATION
A. Effectivity
All Microtecnica Flap Power Unit (FPU) having Microtecnica part number C148656-1 and 
part number C148656-2 installed on the De Havilland Canada DASH-8 Series 400 aircraft.
B. Concurrent Requirements
None.
C. Reason
Investigation of failed FPU pressure switches P/N 150135-1 and P/N 162660-1 in service 
found failures due to internal contamination and hydraulic pressure spikes, respectively. A 
new improved version P/N 162660-2, with a flow restrictor, has been developed to address 
these failures.
D. Description & Solution
This Service Bulletin gives the instruction to replace the old pressure switch P/N 150135-1 
or P/N 162660-1 with the new pressure switch P/N 162660-2.
E. Compliance
Refer to De Havilland Canada cover Service Bulletin.
F. Approval
The technical content of this Service Bulletin has been accepted by the type certificate 
holder De Havilland Canada.
G. Manpower
The manpower for the accomplishment of the upgrade is 3 hours for each FPU.
H. Weight and Balance
Negligible.
I. Electrical Load Data
Not Applicable.
J. Software Accomplishment Summary
Not Applicable.
K. References
ECP 41981.
L. Other Publications Affected
Component Maintenance Manual CMM 27-52-01.
M. Interchangeability or Intermixability of Parts
Refer to De Havilland Canada cover Service Bulletin.
DHC PDF Merged Document SB 84-27-75_Jun 23/22 & Collins Aerospace VSB 27-0029_Jun 13/22
Page 10 of 16

### Page 11

SERVICE BULLETIN
Basic Issue 
June 13/22
SB 27-0029
Page 3
CIRCULATE PROMPTLY
This document does not contain export controlled 
technology or technical data 
IT Export Classification: UNCTD
2. MATERIAL INFORMATION
A. Material Price and Availability
The materials necessary to accomplish this Service Bulletin are listed in Table 1. A 
commercial policy applies as published in Service Information Letter (SIL) 27-004 titled 
“New Pressure Switch P/N 162660-2 ”.The materials will be supplied by Microtecnica, 
upon the receipt of a PO addressed to:
Claudia Cornalea 
Microtecnica Srl. 
P.za Arturo Graf 147, 
10126, Torino, Italy 
Phone: +39-0116932566 Fax: +39-0116932483 
E-mail: claudia.cornalea@collins.com
The materials necessary to accomplish this Service Bulletin on a Flap Power Unit 
(C148656-1 or C148656-2) are listed in Table 1 or Table 2:
Table 1
List of parts for Flap Power Unit - FPU upgrade performed by the operator
Table 2
List of parts for Flap Power Unit - FPU upgrade performed by Microtecnica repair facility
Instruction code A
The “P/N Before this SB“ is replaced by the “New P/N” in new production items. Discard 
the old item. 
 
NOTE (1): The item may be procured locally. Only the specified P/N is approved for this 
Service Bulletin
New P/N QTY Keyword P/N Before this SB Instruction Code
162660-2 1 Pressure Switch 
(VA0076)
150135-1 or 
162660-1
A
3-904E515-80 1 O-ring (V02697) 3-904E515-80 A (see NOTE (1))
New P/N QTY Keyword P/N Before this SB Instruction Code
162660-2 1 Pressure Switch 
(VA0076)
150135-1 or 
162660-1
A
165648-1 1 Nameplate 
(VA0076)
150323-1 or 
162661-1
A
3-904E515-80 1 O-ring (V02697) 3-904E515-80 A
DHC PDF Merged Document SB 84-27-75_Jun 23/22 & Collins Aerospace VSB 27-0029_Jun 13/22
Page 11 of 16

### Page 12

Basic Issue 
June 13/22
SB 27-0029
Page 4 
SERVICE BULLETIN
CIRCULATE PROMPTLY
This document does not contain export controlled 
technology or technical data 
IT Export Classification: UNCTD
B. Industry Support Information
This modification will be introduced:
• With the FPU installed or removed from aircraft, by aircraft maintenance personnel.
• With the FPU removed from the aircraft, at the Microtecnica repair facility.
C. Material Necessary For Each Unit
According to Para 2 point A Table 1 or Table 2.
D. Material Necessary For Each Spare
According to Para 2 point A Table 1 or Table 2.
E. Reidentified Parts
The accomplishment of this Service Bulletin amends the Flap Power Unit (FPU) from P/N 
C148656-1 or P/N C148656-2 to P/N C148656-3. 
Refer to Paragraph 3 point C.
F. Tooling - Price and Availability
No special tools are required to perform this Service Bulletin.
DHC PDF Merged Document SB 84-27-75_Jun 23/22 & Collins Aerospace VSB 27-0029_Jun 13/22
Page 12 of 16

### Page 13

SERVICE BULLETIN
Basic Issue 
June 13/22
SB 27-0029
Page 5
CIRCULATE PROMPTLY
This document does not contain export controlled 
technology or technical data 
IT Export Classification: UNCTD
3. ACCOMPLISHMENT INSTRUCTIONS
A. General
(1) The replacement of the pressure switch can be performed with the Flap Power Unit 
(FPU) installed on (in situ) or removed from the aircraft:
(a) If the upgrade is performed by the operator, refer to the procedure at Para 3.B.(1).
(b) If the upgrade is performed by Microtecnica repair facility, refer to the procedure 
at Para 3.B.(2).
B. Procedure
(1) FPU upgrade performed by the operator:
(a) Remove the pressure switch from the FPU in accordance with AMM TASK 27-52-
01-000-802.
(b) Replace the old pressure switch P/N 150135-1 or P/N 162660-1  with the new 
pressure switch P/N 162660-2.
(c) Install the new pressure switch on the FPU in accordance with AMM TASK 27-52-
01-400-802.
(d) Reidentify the FPU in accordance with Para 3.C.(1).
(2) FPU upgrade performed by Microtecnica repair facility:
(a) Remove the pressure switch from the FPU in accordance with C MM 27-52-01, 
Disassembly chapter.
(b) Replace the old pressure switch P/N 150135-1 or P/N 162660-1  with the new 
pressure switch P/N 162660-2.
(c) Install the new pressure switch on the FPU in accordance wit h CMM 27-52-01, 
Assembly chapter.
(d) Reidentify the FPU in accordance with Para 3.C.(2).
(e) Test the FPU in accordance with CMM 27-52-01, Testing and Tr ouble-shooting 
chapter.
DHC PDF Merged Document SB 84-27-75_Jun 23/22 & Collins Aerospace VSB 27-0029_Jun 13/22
Page 13 of 16

### Page 14

Basic Issue 
June 13/22
SB 27-0029
Page 6 
SERVICE BULLETIN
CIRCULATE PROMPTLY
This document does not contain export controlled 
technology or technical data 
IT Export Classification: UNCTD
C. Reidentification
(1) FPU upgrade performed by the operator:
(a) Use a electrical marker or impression stamp to modify the nameplate in 
accordance with Table 3 and Figure 1.
Table 3
Reidentification - FPU upgrade performed by the operator
Figure 1
Reidentification - FPU upgrade performed by the operator
(2) FPU upgrade performed by Microtecnica repair facility:
(a) Remove the old nameplate, refer to the CMM 27-52-01. Do not discard the 
nameplate at this step.
(b) Use a electric marker or impression stamp to modify the new nameplate P/N 
165648-1 in accordance with Table 4 and Figure 2.
Nameplate Field Instruction Nameplate field after 
this SB
DHI SPEC. NO. Mark an X on the current dash number and write 3 8SC0999-003
MFR P/N Mark an X on the current dash number and write 3 C148656-3
MOD. STATE Mark an X on the current mod letter and write A A
DHC PDF Merged Document SB 84-27-75_Jun 23/22 & Collins Aerospace VSB 27-0029_Jun 13/22
Page 14 of 16

### Page 15

SERVICE BULLETIN
Basic Issue 
June 13/22
SB 27-0029
Page 7
CIRCULATE PROMPTLY
This document does not contain export controlled 
technology or technical data 
IT Export Classification: UNCTD
Table 4
Reidentification - FPU upgrade performed by Microtecnica repair facility
Figure 2
Reidentification - FPU upgrade performed by Microtecnica repair facility
(c) Discard the old nameplate.
(d) Install the new nameplate on the FPU, refer to CMM 27-52-01.
Nameplate Field Instruction 
SERIAL NUMBER Copy from the old nameplate
MOD. STATE Write A
DHC PDF Merged Document SB 84-27-75_Jun 23/22 & Collins Aerospace VSB 27-0029_Jun 13/22
Page 15 of 16

### Page 16

Basic Issue 
June 13/22
SB 27-0029
Page 8 
SERVICE BULLETIN
CIRCULATE PROMPTLY
This document does not contain export controlled 
technology or technical data 
IT Export Classification: UNCTD
THIS IS A BLANK PAGE
DHC PDF Merged Document SB 84-27-75_Jun 23/22 & Collins Aerospace VSB 27-0029_Jun 13/22
Page 16 of 16

### Page 17

Oct 2019
SERVICE BULLETIN (SB) - - - RECORD OF INCORPORATION
DASH 8 AIRCRAFT
To : CMDB Focal
Email: cmdb.request@dehavilland.com
From:
Company:
Phone: Extn:
Facsimile: Date:
Email:
The data that you provide below will help us record the incorporation of this Service
Bulletin and the aircraft effectivity in the maintenance manual.
Operator: Service Bulletin: __________________ Revision: _________
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Email PDF to:
cmdb.request@dehavilland.com

### Page 18

Oct 2019
SERVICE BULLETIN (SB) - - - COMMENT SHEET - - - DASH 8 AIRCRAFT
To: SB Focal, DE HAVILLAND AIRCRAFT OF CANADA LIMITED   
Phone: 1-844-359-3428
Email: george.moffatt@dehavilland.com
From:
Company:
Phone: Extn:
Facsimile: Date:
Email:
Select appropriate box(es) and add comments or suggestions you would like us to know
that may enhance the quality of our service bulletins.
Service Bulletin: Revision: ModSum:
1. PLANNING INFORMATION
V Effectivity V Reason V Description V Compliance
V Approval V Manpower V Material V Weight and Balance
V Electrical Load V T ooling V References V Publications Affected
2. MATERIAL INFORMATION
V Kit Content V Special T ools/Equipment V Parts to Modify Spares
V Consumables V Disposition of Existing Parts V Other
3. ACCOMPLISHMENT INSTRUCTIONS
V J o b S e t --- U p V Procedure V Close- - -Out V Te s t
V Illustration(s) V Other
4. COMMENTS, REMARKS, SUGGESTIONS
Email PDF to:
george.moffatt@dehavilland.com

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain, except the copies of manufacturers’ service documents, which belong to their rights holders.