Piper Aircraft Corporation Malibu Mirage PA-46-350P, Airplane Maintenance Manual

Page: 1382 / 1956

PAGE 4
Feb 28/07
7E8
71-20-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
B. Installation
CAUTION: WHEN INSTALLING A REPLACEMENT ENGINE MOUNT ASSEMBLY, ENSURE IT
CONFORMS TO THE LATEST DESIGN AS SHOWN IN FIGURE 1, SHEET 2.
Pay close attention to the nose gear actuator / engine mount connecting hardware to ensure the
correct locknut is used (i. e. - P/N 404-891, MS 20365-720C). Additionally, check for proper thread
engagement between the bolt and nut by ensuring at least one thread of the bolt protrudes through
the nut per AC 43.13-1, latest revision. If sufficient threads are not exposed after the lock nut,
replace the bolt with a longer bolt, P/N 401-509 (AN7-15A). Torque to the standard torque value
(91-10-00, Chart 6) for a 7/16-20 AN7 bolt/MS 20365 nut.
2. Engine Shock Mounts Replacement
The engine shock mounts may be replaced with the engine installed as well as removed from the
airplane. Refer to Figure 1, 71-00-00, for the arrangement of the shock mount assemblies. The top
shocks are assembled so the silver colored shocks are aft and the gold colored shocks are forward. The
lower shock mounts are installed opposite of the top shock mounts. The procedure described in this
paragraph is with the engine installed.
A. Remove the engine cowling.
B. Attach a one-half ton (minimum) hoist to the engine hoisting hooks and relieve tension from the
shock mounts.
C. Loosen the upper shock mount attachment nuts.
D. Remove the lower mount attachment nuts, washers, forward shock mounts and spacers.
E. Remove the lower attachment bolts just far enough to allow the aft shock mounts to be removed.
The bushing in each lower mount must be removed with the bolt.
CAUTION: CARE SHOULD BE TAKEN NOT TO INTRODUCE ADVERSE STRESSES ON THE
CONTROL CABLES, ELECTRICAL CABLES, HOSES AND OTHER ITEMS
ATTACHED TO THE ENGINE, WHILE HOISTING THE ENGINE.
F. Raise the nose of the engine enough to remove the lower aft shock mounts and replace with new
ones.
G. Lower the engine, slide the attachment bolts with bushings into place and install the spacers,
forward shock mounts, washers and nuts. Start nuts only a few threads.
H. Rotate the heat shields on the lower mounts to provide the greatest protection against exhaust
heat.
I. Remove the upper mount attachment bolts, nuts, washers, forward shock mounts and spacers.
J. Lower the engine enough to replace the upper aft shock mounts. Raise the engine into position.
K. Install the spacers, forward shock mounts, mounting bolts, washers and nuts.
L. Tighten engine shock mounts (4) to torque specified in Figure 1, 71-00-00.