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

Page: 810 / 1956

PAGE 4
Feb 28/07
4E4
32-30-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
2. Landing Gear Retraction System Functional Test
(PIR-PPS60033-7, Rev. G/-9, Rev. J/-13, Rev. NEW.)
WARNING: BE SURE AIRPLANE IS ON JACKS BEFORE PROCEEDING WITH THE FOLLOWING
TEST.
The following test verifies that the landing gear retraction system is functioning properly.
A. Set up
(1) Verify that the main and nose gears are properly adjusted (see 32-10-00 and 32-20-00,
respectively).
(2) Place the airplane on jacks per 7-10-00.
(3) Connect a 28 Vdc regulated power source capable of supplying a minimum of 50 amperes to
the aircraft electrical system.
NOTE: With power supplied through the auxiliary power plug the batt-master switch should
remain in the "OFF" position. The APU circuit bypasses the batt-master switch to
energize the ship power circuits.
NOTE: Before starting test, check for adequate clearance of nose gear lights, sequence
valves, actuators, hoses, etc.
NOTE: Never operate the emergency gear release piston with the hydraulic pump circuit
breaker “IN”.
(4) During all tests, add clean filtered MIL-H-5606 (Revision "F" or higher) hydraulic fluid to the
reservoir as necessary to keep fluid level at the "F" (full) mark on the sight gauge with the gear
down.
(5) Bleed the hydraulic system per 29-10-00, Bleeding Hydraulic System.
(6) Set the sequence valve.
Adjust the plunger screw outward until the sequence lever depresses the plunger
approximately .125 inch when the nose gear is fully retracted, and the nose gear door
actuating torque tube rotates. Lock the plunger and screw in place and connect the nose gear
door actuation rods. These rods shall be long initially and shortened progressively until the
nose gear doors seat firmly, but are not distorted when closed. Cycle the gear as required to
ensure proper operation.
(7) Check/adjust switches.
(a) Check/adjust squat switch per Landing Gear Safety Switch (Squat Switch) Adjustment,
32-60-00.
(b) Check to ensure that the gear door closed (gear "UP") switches are wired to the proper
panel indicator light (gear warning annunciator).