CESSNA
SECTION 3
MODEL 172S NAV III
EMERGENCY PROCEDURES
ICING
(Continued)
STATIC SOURCE BLOCKAGE
(ERRONEOUS INSTRUMENT READING SUSPECTED)
1. ALT STATIC AIR Valve - PULL ON
2. CABIN HT and CABIN AIR Knobs - PULL ON
3. Vents - CLOSED
4. Airspeed - Refer to Section 5, Figure 5-1 (Sheet 2) Airspeed
Calibration, Alternate Static Source correction chart.
EXCESSIVE FUEL VAPOR
FUEL FLOW STABILIZATION PROCEDURES
(If flow fluctuations of 1 GPH or more, or power surges
occur.)
1. FUEL PUMP Switch - ON
2. Mixture Control - ADJUST (As necessary for smooth engine
operation)
3. Fuel Selector Valve - SELECT OPPOSITE TANK (if vapor
symptoms continue)
4. FUEL PUMP Switch - OFF (after fuel flow has stabilized)
172SPHAUS-03
U.S. 3-13