Dual Alternator Failure - Piper SEMINOLE 2013 Pilot Operating Handbook

PA-44-180, SEMINOLE
3.5j Electrical failures (continued)
Indication: Master Warning, Triple chime,
Approximately 30 minutes of electrical power
remains after a dual alternator failure. To ensure
30 minutes of battery power, complete the Load
Shedding procedure below, within 3 minutes of

dual alternator failure.

Verify Failure....................................... CHECK ALTR AMPS Indication
Attempt to reset alternators:
Failed ALTR Switches .... ...................................................OFF
Failed Alternators Field Circuit Breaker ........................RESET if tripped
Failed ALTR Switches . .......................................................ON
If only one alternator resets:
Operating ALTR Switch ...................................................................... ON
Failed ALTR Switch ...........................................................................OFF
Electrical Load .................................. MAINTAIN LESS than 75 AMPS
Ammeter .................................................................................. MONITOR
If neither alternator resets:
Both Alternator Switches .................................................................... OFF
Electrical Load.. .................................SHED in less than 3 minutes
NON ESS BUS Circuit Breaker (Row 1, Col. 1) ............................ PULL
LIGHTING BUS Circuit Breaker (Row 1, Col. 2) .......................... PULL
AVIONICS BUS Circuit Breaker (Row 1, Col. 3) .......................... PULL
AVION MASTER Switch................................................... OFF
EMER BATT ......................................................... ............VERIFY ARM
ISSUED: June 5, 2013
REVISED: October 27, 2014
Dual Alternator failure
R ALTR FAIL
cAUTION
L ALTR FIELD Circuit Breaker (Row 2, Col. 15)
R ALTR FIELD Circuit Breaker (Row 2, Col. 16)
EMERGENcy PROcEDURES
L ALTR FAIL
(60 AMPS on ground)
REPORT: VB-2307
SEcTION 3
and
3-27