Passenger (pilot) reports landing on a highway when the aircraft ran out of fuel. This pilot reports a cylinder intake leak that caused a high fuel burn rate as a result of erroneous leaning of the engine.

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Attributes
ACN	341856
Time
Date	199607
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : 7a2
State Reference	AL
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : nmm
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	landing other
Flight Plan	None
Person 1
Affiliation	Other
Function	observation : passenger
Qualification	pilot : atp pilot : cfi pilot : instrument pilot : commercial
Experience	flight time last 90 days : 80 flight time total : 4300 flight time type : 25
ASRS Report	341856
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Events
Anomaly	non adherence : far other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Normal flight planned for 4 hours, with 4 hours 45 mins fuel. I observed the PF lean for best power. The engine failed at 3 hours and 45 mins, due to fuel exhaustion. We landed on highway without damage to the aircraft or property. Mechanical inspection revealed left-front cylinder intake leak to cause erroneous leaning of the engine and high fuel burn rate. I suggest a 4 probe exhaust gas temperature system for early mechanical malfunction detection, and alternate tank selector (to left or right) on maximum range flts.

Original NASA ASRS Text

Title: PAX (PLT) RPTS LNDG ON A HWY WHEN THE ACFT RAN OUT OF FUEL. THIS PLT RPTS A CYLINDER INTAKE LEAK THAT CAUSED A HIGH FUEL BURN RATE AS A RESULT OF ERRONEOUS LEANING OF THE ENG.

Narrative: NORMAL FLT PLANNED FOR 4 HRS, WITH 4 HRS 45 MINS FUEL. I OBSERVED THE PF LEAN FOR BEST PWR. THE ENG FAILED AT 3 HRS AND 45 MINS, DUE TO FUEL EXHAUSTION. WE LANDED ON HWY WITHOUT DAMAGE TO THE ACFT OR PROPERTY. MECHANICAL INSPECTION REVEALED LEFT-FRONT CYLINDER INTAKE LEAK TO CAUSE ERRONEOUS LEANING OF THE ENG AND HIGH FUEL BURN RATE. I SUGGEST A 4 PROBE EXHAUST GAS TEMP SYS FOR EARLY MECHANICAL MALFUNCTION DETECTION, AND ALTERNATE TANK SELECTOR (TO L OR R) ON MAX RANGE FLTS.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.