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Conquest SER VICE
BULLETIN CQB - 57 - 01 TITLE WINGS - ACCESS P ANEL INST ALLA TION FOR FOR W ARD SP AR
EFFECTIVITY MODEL SERIAL
NUMBERS 425 425 - 0001 thru 425 - 0236 REASON Customers have requested an access panel to gain easy access to the forward spar for inspections.
DESCRIPTION This service document provides parts and instructions to trim the lower skin and install an access panel on the wings.
COMPLIANCE OPTIONAL.
This service document can be accomplished at the discretion of the owner .
A service document published by T extron A viation may be recorded as completed in an aircraft log only when the following requirements are satisfied:
1) The mechanic must complete all of the instructions in the service document , including the intent therein.
2) The mechanic must correctly use and install all applicable parts supplied with the service document kit.
Only with written authorization from T extron A viation can substitute parts or rebuilt parts be used to replace new parts.
3) The mechanic or airplane owner must use the technical data in the service document only as approved and published.
4) The mechanic or airplane owner must apply the information in the service document only to aircraft serial numbers identified in the Effectivity section of the document.
5) The mechanic or airplane owner must use maintenance practices that are identified as acceptable standard practices in the aviation industry and governmental regulations.
No individual or corporate organization other than T extron A viation is authorized to make or apply any changes to a T extron A viation - issued service document or flight manual supplement without prior written consent from T extron A viation.
T extron A viation is not responsible for the quality of maintenance performed to comply with this document , unless the maintenance is accomplished at a T extron A viation - owned Service Center .
APPROV AL T extron A viation received F AA approval for the technical data in this publication that changes the airplane type design.
FLIGHT CREW OPERA TIONS No Changes CQB - 57 - 01 December 20 , 2017 Page 1 of 7 T extron A viation Customer Service , P .O.
Box 7706 , Wichita , KS 67277 , U.S.A.
1 - 316 - 517 - 5800 This document contains technical data and is subject to U.S.
export regulations.
This information has been exported from the United States in accordance with export administration regulations.
Diversion contrary to U.S.
law is prohibited.
ECCN:
9E991
COPYRIGHT © 2017
CQB - 57 - 01 Page 2 December 20 , 2017 Conquest SER VICE
BULLETIN CQB - 57 - 01
CONSUMABLE MA TERIAL Y ou must use the consumable materials that follow , or their equivalent , to complete this service document.
NAME NUMBER MANUF
ACTURER USE Color Chemical Film U074093 T extron A viation Parts Distribution 7121 Southwest Boulevard Wichita , KS 67215 T o protect bare material for final finish.
Corrosion Resistant Primer K000574 T extron A viation Parts Distribution Final finish for aluminum.
T OOLING No specialized tooling is required to complete this service document.
WEIGHT AND
BALANCE
INFORMA TION Negligible
REFERENCES Cessna Model 425 Maintenance Manual NOTE:
T o make sure all publications used are complete and current.
Refer to www .txtavsupport.com.
PUBLICA TIONS
AFFECTED None
ACCOMPLISHMENT
INSTRUCTIONS
1.
Prepare the airplane for maintenance.
A.
Make sure that the airplane is electrically grounded.
B.
Make sure that all switches are in the OFF / NORM position.
C.
Disconnect electrical power from the airplane.
(1) Disconnect the airplane battery .
(2) Disconnect external electrical power .
D.
Attach maintenance warning tags to the battery and external power receptacle that have "DO NOT
CONNECT
ELECTRICAL POWER -
MAINTENANCE IN PROGRESS" written on them.
2.
Remove the access panels.
A.
Remove and keep the MS27039 - 0808 Screws from access panels 51 1CB and 61 1CB.
(Refer to the Model 425 Maintenance Manual.)
NOTE:
The MS27039 - 0808 Screws will be used to install the new access panel.
B.
Remove and discard access panels 51 1CB and 61 1CB.
(Refer to the Model 425 Maintenance Manual.)
C.
Remove and keep the aft row of MS24694 - S50 Screws from the 51 1BB and 61 1BB access panels.
(Refer to the Model 425 Maintenance Manual.)
NOTE:
The MS24694 - S50 Screws will be used to install the new access panel.
3.
(If 5991001 - 7 Panels are not purchased.)
(Refer to Figure 1 , Detail B.)
Fabricate the access panels.
A.
Cut out two
7.50 inch by
5.67 inch rectangles from the S3806 - 1 1 Sheet Material or ALCLAD 2024 - T3.
B.
Cut , trim , and shape the panel as necessary .
C.
Identify one panel as LEFT and one as RIGHT .
Conquest SER VICE
BULLETIN CQB - 57 - 01 D.
Identify one surface on each of the panels as UP .
E.
Roll or crimp the outer
0.25 inch of the panel upward 6° around the perimeter .
F .
Protect the fabricated panels with U074093 Color Chemical Film and K000574 Corrosion Resistant Primer .
4.
(Refer to Figure 1 , Detail A.)
Make the cutout in lower right wing skin.
NOTE:
The cutout dimension is identified in Figure 1 Detail A.
A.
Identify the area to cut the lower wing skin between the engine and fuselage inboard of the rib.
B.
Put the 5991001 - 7 (or fabricated) Access Panel into position and trace the outline on the lower wing skin.
C.
Remove the rivets that are inside the traced panel outline.
D.
Insert a piece of scrap stainless steel between the lower wing skin and the lower forward spar cap.
W ARNING:
Do not damage the forward spar when making the cutout in the lower wing skin.
Any damage to the forward spar will likely required spar , spar cap , or spar fitting replacement.
Premature cracking may occur if damage to the spar , spar cap , or spar fitting is not noticed.
Mechanics should use great care and caution when making this cutout.
Every effort must be made to protect the spar , spar cap , and spar fitting from damage.
E.
Make the cutout in the lower wing skin at the identified area.
F .
Deburr the cutout.
G.
Remove the scrap stainless steel.
H.
Protect the edges of the cutout with U074093 Color Chemical Film and K000574 Corrosion Resistant Primer .
5.
(Refer to Figure 1 , Detail A.)
Install the nutplate on the right wing.
A.
Measure and identify the location for the MS21069L3 Nutplate.
B.
Drill one
0.171 inch - diameter hole in the lower wing skin at the identified location.
C.
Match drill two Number 40
(0.098 inch - diameter) holes in the lower wing skin that align with the holes in the MS21069L3 Nutplates.
D.
Deburr the drilled holes.
E.
Countersink the Number 40
(0.098 inch - diameter) holes 100° x
0.179 inch - diameter .
F .
Install one MS21069L3 Nutplate with two MS20426AD3 - 4A Rivets.
6.
(Refer to Figure 1 , Detail A.)
Install 14 CM3827AD4 - 6 Rivets on the right wing.
A.
Countersink 14 Number 30
(0.128 inch - diameter) holes 100° x
0.190 inch - diameter .
B.
Install 14 CM3827AD4 - 6 Rivets to attach the skin to the wing structure.
7.
(Refer to Figure 1 , Detail A.)
Install the access panel on the right wing.
A.
Put the 5991001 - 7 or fabricated Access Panel into position and identify the hole locations.
NOTE:
Make sure that the crimped surface of the panel contacts the lower wing skin.
B.
Match drill 13
0.171 inch - diameter holes in the aft portion of the 5991001 - 7 or fabricated Access Panel that align with the nutplates.
C.
Match drill seven Number 10
(0.193 inch - diameter) holes in the forward portion of the 5991001 - 7 or fabricated Access Panel that align with the nutplates.
CQB - 57 - 01 December 20 , 2017 Page 3
CQB - 57 - 01 Page 4 December 20 , 2017 Conquest SER VICE
BULLETIN CQB - 57 - 01 D.
Deburr the drilled holes.
E.
Dimple seven Number 10
(0.193 inch - diameter) holes at 100°.
F .
Enlarge the existing countersinks in the wing skin if necessary to allow the 5991001 - 7 (or fabricated) Access Panel to sit flush.
G.
Protect the 5991001 - 7 (or fabricated) Access Panel with U074093 Color Chemical Film and K000574 Corrosion Resistant Primer .
H.
Paint the 5991001 - 7 (or fabricated) Access Panel the same color as the lower surface of the wing.
I.
Install the 5991001 - 7 (or fabricated) Access Panel with one MS27039 - 0808 Screw and the 19 kept screws from Step
2.
8.
Do this modification for the left wing.
9.
Remove the maintenance warning tags and connect the airplane battery .
10.
Make an entry in the airplane logbook that states compliance and method of compliance with this service document.
Beechcrafi Hawker Conquest SERVICE BULLETIN Cessna
TEXTRON AVIATION CQB-57-01 A104678 BL Number 10
55.05 6.50 (0.193-Inch (Reference) Diameter) Hole
1.10 (7 Required) CM3827AD4-6 Rivet (14 Required)
0.45 (Reference)
1.94
0.55 0811350 Fitting 0.35 (Reference) (Reference)
0.171-Inch 5911011 0.35 Diameter Hole Skin Assembly MS21069L3 (Reference) Nutplate MS27039-0808 $ 1.70→
0.25 Screw (Reference) 0.171-Inch (1 Each Required) Diameter Hole (12 Required) MS20426AD3-4A Rivet (2 Required)
FWD DETAIL A OUTBD Left Side Opposite Right Side Shown 5991001-7 Access Panel (1 Required) NOTE: All Dimensions Shown are in Inches 59103001 5991T001 Figure 1. Access Panel Installation For Forward Spar (Sheet 1) CQB-57-01 December 20, 2017 Page 5
Beechcraft Hawker Conquest SERVICE BULLETIN Cessna TEXTRON ÀVIATION CQB-57-01 A104679
0.25-Inch 1.50-Inch 0.25-Inch Radius Corner Radius Corner Radius Corner 1.65 →
1.55
3.05
7.50
1.50-Inch Radius Corner ЛА
5.67
0.25-Inch (2 Places) 0.25-Inch Radius Corner Radius Corner
DETAIL B Fabricate from S3806-11
(0.050-Inch Alclad 2024-T3) Crimp Edge Upward 6-Degrees by 0.125-Inch
VIEW A-A 59103001 5991T001 Figure 1. Access Panel Installation For Forward Spar (Sheet 2) CQB-57-01 Page 6 December 20, 2017
Conquest SER VICE
BULLETIN CQB - 57 - 01 MA TERIAL
INFORMA TION Order the kit / parts below to install this modification.
NEW P / N QUAN- TITY KEY WORD OLD P / N
INSTRUCTIONS /
DISPOSITION CQB - 57 - 01 1 Kit , consisting of the following parts:
CM3827AD4 - 6 28 Rivet MS20470AD4 - 6A Discard MS21069L3 2 Nutplate None MS27039 - 0808 2 Screw None MS20426AD3 - 4A 4 Rivet None CQB - 57 - 01 1 Instructions The part that follows is required to complete this modification.
NEW P / N QUAN- TITY KEY WORD OLD P / N
INSTRUCTIONS /
DISPOSITION 5991001 - 7 2 Access Panel 591 1017 - 5 and 591 1017 - 6 Discard If 5991001 - 7 Access Panels are not available , the part that follows can be used to fabricate two 5292032 - 4 Access Panels.
NEW P / N QUAN- TITY KEY WORD OLD P / N
INSTRUCTIONS /
DISPOSITION S3806 - 1 1 1 Sheet Material None Optional to fabricate access panel * Please contact a T extron A viation Authorized Service Facility for current cost and availability of parts listed in this service document.
CQB - 57 - 01 December 20 , 2017 Page 7
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Conquest OWNER
ADVISOR Y CQB - 57 - 01 TITLE WINGS - ACCESS P ANEL INST ALLA TION FOR FOR W ARD SP AR T O:
Cessna Model 425 Aircraft Owner REASON Customers have requested an access panel to gain easy access to the forward spar for inspections.
COMPLIANCE OPTIONAL.
This service document can be accomplished at the discretion of the owner .
MA TERIAL A V
AILABILITY No part are required to complete this service document.
P ART NUMBER A V
AILABILITY COST CQB - 57 - 01 * * S3806 - 1 1 * * 5991001 - 7 * * * Please contact a T extron A viation Authorized Service Facility for current cost and availability of parts listed in this service document.
W
ARRANTY None NOTE:
As a convenience , service documents are now available online to all our customers through a simple , free - of - charge registration process.
If you would like to sign up , please visit the Customer Access link at www .txtavsupport.com to register .
CQB - 57 - 01 December 20 , 2017 Page 1 of 1 T extron A viation Customer Service , P .O.
Box 7706 , Wichita , KS 67277 , U.S.A.
1 - 316 - 517 - 5800 This document contains technical data and is subject to U.S.
export regulations.
This information has been exported from the United States in accordance with export administration regulations.
Diversion contrary to U.S.
law is prohibited.
ECCN:
9E991
COPYRIGHT © 2017
No text on this page: it may be a figure. Open the PDF to see it.