Piper Aircraft Corporation Lock Haven, Pennsylvania, U.S.A.
FAA/DOA SO-l Approved November 14, 1978 S/M
Subject: Hose Assembly Inspection and Replacement
IMPORTANT NOTICE :
If any of the below listed models,
regardless of the serial numbers affected
or if any PA-28R-180/PA-28R-200 models
in operation have had any of the Part Number
63901-41 Hose Assemblies changed (replaced)
between December 12, 1977 and the date of
this release, they are to be inspected in
accordance with this Service Bulletin.
Models Affected: Serial Numbers Affected:
PA-28R-201 28R-7837105 to 28R-7837317 Inclusive
Cherokee Arrow III
PA-28R-201T 28R-7803154 to 28R-7803372 Inclusive
Cherokee Turbo Arrow III
PA-34-200T 34-7870100 to 34-7870361 Inclusive
Seneca II 34-7870363 to 34-7870428 Inclusive
34-7870430 to 34-7870446 Inclusive
34-7870448 to 34-7870456 Inclusive
34-7870459 to 34-7870464 Inclusive
34-7870467 to 34-7870474 Inclusive
PA-44-180 44-7995001 to 44-7995064 Inclusive
Seminole 44-7995066 to 44-7995069 Inclusive
44-7995071 to 44-7995084 Inclusive
44-7995086, 44-7995091, 44-7995095,
44-7995099, and 44-7995106,
44-7995108 to 44-7995127 Inclusive
Compliance Time : Within the next ten (10) hours of operation or at
the next regularly scheduled progressive, 100 hour
or annual inspection, whichever occurs first.
over
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Service Bulletin No. 611 Page 2 of 5 L
I
Purpose : We have been advised by the Deutsch Metal Components Division of
Los Angeles, California that some of the Hose Assemblies identified above, which have
the assembly date of 4Q77 or lQ78, could have been assembled from a batch of hose
material, some of which was found to have a delaminated tube condition. Delamination
of a hose can cause intermittent, partial or full blockage, or leakage because the
delamination can act like a flap within the hose. It is also possible that pieces of the
tube may break away and be free within the system affected.
As a precaution, all Part Number 63901-41 Hose Assemblies, used on the above
affected models, or purchased for replacement between December 12, 1977 and the date
of this Service Release, which have the 4Q77 or 1Q78 assembly date on the metal
identification tag, are to be removed from service and returned to Piper Aircraft-
Corporation, Vero Beach Division.
Instructions :
NOTE :
If an equivalent substitute hose assembly is found in
the locations described in this Service Bulletin,
replacement is not necessary. This inspection and
replacement (if required) only applies to Part Number
63901-41.
PA-28R-201 (180/200 if affected) and PA-28R-201T
1 .a. On the PA-28R-180/200/201 models affected remove top cowl, locate the Part
Number 63901-41 Hose Assembly, Fuel Pressure, installed at the Engine Injector.
Inspect the metal identification tag on the Hose Assembly for the assembly date
of 4Q77 or 1Q78. (See attached sketch) .
b. If the Hose Assembly has an assembly date other than 4Q77 or 1Q78, no further
action is necessary. Replace top cowl removed in Instruction 1 .a. and proceed to
Jnstruction 3 .a.
C. If the Hose Assembly has an assembly date of 4Q77 or lQ78, it is to be replaced.
See Material Required. Replace top cowl removed in Instruction 1 .a. and proceed
to Instruction 3 .a.
2.a. On the PA-28R-201T models affected remove top cowl, locate the Part Number
63901-41 Hose Assembly. Manifold Pressure, installed at the left hand rear of the
engine. Inspect the metal identification tag on the Hose Assembly for the assembly
date of 4Q77 or 1Q78. (See attached sketch).
b. If the Hose Assembly has an assembly date other than 4Q77 or lQ78, no further
action is necessary. Replace top cowl removed in Instruction 2.-a,. and proceed
to Instruction 3 .a.
C. If the Hose Assembly has an assembly date of 4Q77 or lQ78, it is to be replaced.
See Material Required. Replace top cowl removed in Instruction 2 .a. and proceed
to Instruction 3 .a.
Ra
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Service Bulletin No. 611 Page 3 of 5
Instructions : (continued)
3.a. On the PA-28R-180/200/201 and PA-28R-201T models affected, locate the
Part Number 63901-41, Nose Gear Actuator Hose Assembly, two (2) each,
one (1) gear up side and one (1) gear down side. Inspect the metal
identification tag on the Hose Assemblies for the assembly date of
4Q77 or 1Q78. (See attached sketch).
b. If the Hose Assemblies both have an assembly date other than 4Q77 or
1Q78, no further action is required, Make an appropriate log book entry
that this Service Release has been complied with.
C. If either or both Hose Assemblies have an assembly date of 4Q77 or 1Q78,
place the aircraft on jacks (See Service Manual) and proceed with Instruction 4.
4.a. Remove the Hose Assembly(ies) with the 4Q77 or 1Q78 assembly date(s).
Visually inspect the Hose Assembly(ies) for any blockage, deterioration or
signs of leakage that would indicate delamination.
b. If no signs of delamination are present, replace the line(s) with new Hose
Assemblies and proceed to Instruction 4 .d.
C. If signs of delamination are indicated, obtain new Hose Assembly(ies) and
proceed with Instruction 5.a. through 5 .g.
d. Cycle landing gear and check for leaks. (See Service Manual).
e. Remove aircraft from jacks and make appropriate log book entry that this
Service Bulletin has been complied with.
5.a. If the Hose Assembly(ies) removed in Instruction 4 .a., indicate signs of
delamination, the Nose Gear Retraction Hydraulic Lines will require flushing
as a precaution against delaminated pieces of inner lining of the Hose Assembly
being lodged in the lines .
b. With the Hose Assembly(ies) removed, allow sufficient hydraulic fluid to flow
out of the system through the open line(s) by placing the landing gear selector
in the appropriate position and operating the hydraulic power pack. Keep
sufficient clean hydraulic fluid in the power pack reservoir to thoroughly
flush out the line(s).
c. Remove the nose gear actuator and flush with clean hydraulic fluid.
(See Service Manual).
d. Reinstall the Nose Gear Actuator, (See Service Manual).
e. Install replacement Hose Assembly(ies). See Material Required.
f. Cycle landing gear and check for leaks. (See Service Manual).
g* Remove aircraft from jacks and make an appropriate log book entry that this
Service Bulletin has been complied with.
PA-34-200T
1. Remove engine side cowlings left and right, both engines.
2. Locate the Part Number 63901-41 Hose Assembly, cylinder drain. Two (2)
each per engine, total of four (4) per aircraft.
3. Inspect the metal identification tags on the Hose Assemblies for the assembly
date of 4Q77 or 1Q78. (See attached sketch).
4. If the Hose Assemblies have an assembly date other than 4Q77 or lQ78, no
further action is necessary. Proceed to Instruction 6.
Service Bulletin No. 611 Page 4 of 7
Instructions : (continued)
5. If any of the Hose Assemblies have an assembly date of 4Q77 or 1Q78, they
are to be replaced. See Material Required.
6. _ Replace cowlings removed in Instruction 1.
7. Make an appropriate log book entry that this Service Bulletin has been complied with.
PA-44-180
1. Remove top cowling, both engines.
2. Locate the Part Number 63901-41 Hose Assembly, oil pressure installed between
the engine oil filter base and the firewall.
3. Inspect the metal identification tag on the Hose Assembly for the assembly date
of 4Q77 or 1Q78. (See attached sketch).
4. If the Hose Assembly has an assembly date other that 4Q77 or lQ78, no further
action is necessary. Proceed to Instruction 6.
5. If the Hose Assembly has an assembly date of 4Q77 or 1Q78, it is to be replaced.
See Material Required. Run engine, check oil pressure and temperature.
After shutdown check for leaks.
6. Replace cowlings removed in Instruction 1.
7. Make an appropriate log book entry that this Service Bulletin has been complied with.
Material Required:
The following Piper Part Number 63901-41 Hose Assemblies are required by model and
locations as required per applicable Instructions :
PA-28R-201 Cherokee Arrow III Two (2) each Nose Gear Cylinder, one (1) each fuel
(PA-28R-180/200 if affected) pressure; total three (3).
PA-28R-201T Two (2) each Nose Gear Cylinder, one (1) each
Cherokee Turbo Arrow III Manifold Pressure; total three (3).
PA-34-200T Seneca II Four (4) each cylinder drain.
PA-44-180 Seminole Two (2) each oil pressure.
Availability of Parts : Your Piper Field Service Facility.
Effectivity Date: This Service Release is effective upon receipt.
Summary: Please contact your Piper Field Service Facility to make arrangements for
compliance with the provisions of this Service Release in accordance with the Compliance
Time indicated.
For all affected aircraft, reimbursement is available for material and labor, (based on the
number of Hose Assemblies requiring replacement), through your Piper Field Service
Facility in accordance with their respective material/labor allowance credit application
procedure for a period of six (6) months from the date of this release. There is no
reimbursement for inspection only to determine the number of hose assemblies requiring
replacement.
Service Bulletin No. 611
METAL IDENTIFICATION TAG
INSPECT ASSEMBLY DATE. HOSE ASSEMBLY
WITH ASSEMBLY DATE OF 4477 OR 1478
MUST BE REPLACED.
