SDR 2011F00067

Service difficulty report · Indication Sys · Piagio P180

Difficulty date: March 28, 2011
Submitted: March 31, 2011
Operation: Air carrier
Aircraft: N137SL
Make and model: Piagio P180
Aircraft serial: 1102
Aircraft time: 6,118 hours, 4,542 cycles
System (JASC): 3400 · Navigation System
Part: Indication Sys
Condition: Multiple Fail
Location: Cockpit
Stage of operation: DE
How discovered: O
Nature of condition: G
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

AT FL 350 , BOTH AIRSPEED INDICATORS SLOWLY ROLLED TO ZERO, THE FOLLOWING INSTRUMENTS THEN FAILED: PILOTS ALT, EIFIS MASTER CAUTION (HDG), FLT DIRECTOR , FMS NAV DATA, VIS, COPILOTS ALT FROZE THEN BECAME ERRATIC. ALT STATIC SOURSE HAD NO EFFECT. ALL INSTRUMENTS BECAME ERRATIC AFTER 5 MINUTES ABOVE FREEZING. ALL INSTRUMENTS CAME BACK WHEN NEARING AIRPORT ALTITUDE.