Piper SEMINOLE PA-44-180, Maintenance Manual

Page: 35 / 881

PERIODIC INSPECTIONS. (cont.)
NOTES:
1 Refer to the last card to the Piper - Parts Price List - Aerofiche, for a checklist of current revision date
to Piper Inspection Reports and Manuals.
2 All inspections or operations are required at each of the inspection intervals as indicated by a (O).
Both the annual and l00 hour inspections are complete inspections of the airplane identical in scope
while both the 500 and 1000 hour inspections are extensions of the annual or l00 hour inspection
which require a more detailed examination of the airplane, and overhaul of replacement of some major
components. Inspections must be accomplished by persons authorized by the FAA.
3. Piper Service Bulletins are of special importance and Piper considers compliance mandatory.
4. Piper Service Letters are product improvements and service hints pertaining to servicing the airplane
and should be given careful attention.
5. Inspections given for the power plant are based on the engine manufacturer's operator's manual
(Lycoming Part Number 60297-12) for this airplane. Any changes issued to the engine manufacturer's
operator's manual after this date shall supersede or supplement the inspections outlined in this report.
Occasionally, service bulletins or service instructions are issued by Textron Lycoming Division that
require inspection procedures that are not listed in this manual. Such publications usually are limited
to specific models and become obsolete after corrective steps have been accomplished. All such
p u b l ications are available from Textron Lycoming distributors, or from the factory by subscription.
Consult Lycoming Service Letter No. L114 for subscription information. Maintenance facilities
should have an up-to-date file of these publications available at all times.
6 . Intervals between oil changes can be increased as much as 100% on engines equipped with full flow
(cartridge type) oil filters, provided the element is replaced each 50 hours of operation. Add oil additive
LW-16702 at each 50 hour oil change. The additive may be purchased thru Lycoming or Piper
d i s t r ibution systems. Refer to latest revision of Textron Lycoming Service Bulletin No’s. 446 and 480.
7. Replace or overhaul, as required, or at engine overhaul. (For engine overhaul, refer to latest Lycoming
Service Letter L201.
8. Replace engine compartment flexible hoses (fuel, oil, etc.) every 1000 hours time-in-service, 8 years,
or at engine TBO, whichever comes first.
9. Torque all attachment nuts to 135 - 150 inch-pounds; seat "Pal" nuts finger tight against plain nuts;
then tighten and additional 1/3 to 1/2 turn.
10. Check cylinders for evidence of excessive heat which is indicated by burned paint on the cylinders.
This condition is indicative of internal damage to the cylinder and, if found, its cause must be
d e t e rmined and corrected before the aircraft is returned to service.
Heavy discoloration and appearance of seepage at the cylinder head and barrel attachment area
is usually due to emission of thread lubricant used during assembly of the barrel at the factory, or by
slight gas leakage which stops after the cylinder has been in service for awhile. This condition is
n e ither harmful nor detrimental to engine performance and operation. If it can be proven that leakage
exceeds these conditions, the cylinder should be replaced.
11. At every 400 hours of engine operation, remove the rocker box covers and check for freedom of valve
rockers when valves are closed. Look for evidence of abnormal wear or broken parts in the area of the
valve tips, valve keeper, springs and spring seat. If any indications are found, the cylinder and all of
its components should be removed (including the piston and connecting rod assembly) and inspected
for further damage. Replace any parts that do not conform with limits shown in the latest revision for
Lycoming Service Table of Limits No. SSP-1776.
PIPER AIRCRAFT
PA-44-180/180T
AIRPLANE MAINTENANCE MANUAL
5-21-00
Page 5-12
Revised: June 20, 1995
1B11