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

Page: 711 / 1956

PAGE 5
Feb 28/07
30-60-00
3J23
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
CHART 1 (Sheet 4 of 4)
TROUBLESHOOTING PROPELLER HEAT SYSTEM
Trouble Cause Remedy
Radio noise or interference Brushes “arcing.” Check brush alignment
with deicers on. as shown in Figures 3
and 5. Look for rough
or dirty slip rings. If either
condition exists, clean,
machine or replace slip
ring assembly, as required.
Check slip ring alignment.
Loose connection. Refer to “Ammeter flicks
between 90 second phase
period.”
Switch or circuit breaker Place jumper wire across
faulty. switch or circuit breaker.
If radio noise disappears,
replace the switch or circuit
breaker.
Wiring located too close to Relocate deicer wiring at
radio equipment or associated least 8 inches away from
wiring. radio equipment and
wiring.
Rapid brush wear or Brush block out of Check brush alignment.
frequent breakage. alignment. Correct as required.
Slip ring wobbles. Check slip ring alignment
with dial indicator as shown
in Figure 5.
B. Troubleshooting
See Chart 1. See also Testing, below.