What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Lost rpms. Tried for hwd but landed off airport. Nosed over. Post impact engine fire. Throttle disconnected. (From .4) after performing air work, the instructor and student were returning to base. The instructor noted a loss of rpm's from 2,300 to 1,100. He took over the acft controls from the student and attempted to correct the problem. The instructor noted that the rpm's remained constant at 1,100. He conducted the emergency checklist and informed the tower of the situation. The instructor then landed the acft in an open field and the acft came to rest inverted after the nose wheel struck a hole. The acft was examined on-scene and it was noted that the bolt was in place, but that the nut and cotter pin were missing from the carburetor throttle attachment assembly. It was also noted that the acft had flown approx. 15 hours since the last annual inspection and maintenance had been performed. (-23) the pilot stated that he and his student were in cruise flight when the engine lost power. Despite repeated attempts the maximum power he could obtain was 1100 RPM. At this power setting he could not maintain altitude a ND started a descent to an emergency landing in a grass field near dublin, CA. From the pilots statement it appears that normal emergency landing procedures were followed. (.19) on June 24, 1998, at 1500 hours pacific daylight time, a Cessna 150M, N704ZA, experienced a loss of engine power and made an emergency landing in an open field 3 miles west of the Livermore, California, airport. The aircraft, operated by flying vikings under 14 CFR part 91, sustained substantial damage. The commercial rated flight instructor pilot and student pilot, the sole occupants, received minor injuries. Visual meteorological conditions existed for the instructional flight and no flight plan was filed. In an interview with federal aviation administration (FAA) inspector from the oakland, California, flight standards district office, the pilot reported that they were in cruise at 2,500 feet above ground level (AGL) when the engine RPM dropped. They attempted to land at the Livermore airport, but made an emergency landing in an open field. The aircraft came to rest inverted. The army national guard was conducting maneuvers at the time of the accident and rescued the flight instructor and student pilot. They also extinguished a postimpact engine fire.
As the FAA filed it
LOST RPMS. TRIED FOR HWD BUT LANDED OFF AIRPORT. NOSED OVER. POST IMPACT ENGINE FIRE. THROTTLE DISCONNECTED. (FROM .4) AFTER PERFORMING AIR WORK, THE INSTRUCTOR AND STUDENT WERE RETURNING TO BASE. THE INSTRUCTOR NOTED A LOSS OF RPM'S FROM 2,300 TO 1,100. HE TOOK OVER THE ACFT CONTROLS FROM THE STUDENT AND ATTEMPTED TO CORRECT THE PROBLEM. THE INSTRUCTOR NOTED THAT THE RPM'S REMAINED CONSTANT AT 1,100. HE CONDUCTED THE EMERGENCY CHECKLIST AND INFORMED THE TOWER OF THE SITUATION. THE INSTRUCTOR THEN LANDED THE ACFT IN AN OPEN FIELD AND THE ACFT CAME TO REST INVERTED AFTER THE NOSE WHEEL STRUCK A HOLE. THE ACFT WAS EXAMINED ON-SCENE AND IT WAS NOTED THAT THE BOLT WAS IN PLACE, BUT THAT THE NUT AND COTTER PIN WERE MISSING FROM THE CARBURETOR THROTTLE ATTACHMENT ASSEMBLY. IT WAS ALSO NOTED THAT THE ACFT HAD FLOWN APPROX. 15 HOURS SINCE THE LAST ANNUAL INSPECTION AND MAINTENANCE HAD BEEN PERFORMED. (-23) THE PILOT STATED THAT HE AND HIS STUDENT WERE IN CRUISE FLIGHT WHEN THE ENGINE LOST POWER. DESPITE REPEATED ATTEMPTS THE MAXIMUM POWER HE COULD OBTAIN WAS 1100 RPM. AT THIS POWER SETTING HE COULD NOT MAINTAIN ALTITUDE A ND STARTED A DESCENT TO AN EMERGENCY LANDING IN A GRASS FIELD NEAR DUBLIN, CA. FROM THE PILOTS STATEMENT IT APPEARS THAT NORMAL EMERGENCY LANDING PROCEDURES WERE FOLLOWED. (.19) ON JUNE 24, 1998, AT 1500 HOURS PACIFIC DAYLIGHT TIME, A CESSNA 150M, N704ZA, EXPERIENCED A LOSS OF ENGINE POWER AND MADE AN EMERGENCY LANDING IN AN OPEN FIELD 3 MILES WEST OF THE LIVERMORE, CALIFORNIA, AIRPORT. THE AIRCRAFT, OPERATED BY FLYING VIKINGS UNDER 14 CFR PART 91, SUSTAINED SUBSTANTIAL DAMAGE. THE COMMERCIAL RATED FLIGHT INSTRUCTOR PILOT AND STUDENT PILOT, THE SOLE OCCUPANTS, RECEIVED MINOR INJURIES. VISUAL METEOROLOGICAL CONDITIONS EXISTED FOR THE INSTRUCTIONAL FLIGHT AND NO FLIGHT PLAN WAS FILED. IN AN INTERVIEW WITH FEDERAL AVIATION ADMINISTRATION (FAA) INSPECTOR FROM THE OAKLAND, CALIFORNIA, FLIGHT STANDARDS DISTRICT OFFICE, THE PILOT REPORTED THAT THEY WERE IN CRUISE AT 2,500 FEET ABOVE GROUND LEVEL (AGL) WHEN THE ENGINE RPM DROPPED. THEY ATTEMPTED TO LAND AT THE LIVERMORE AIRPORT, BUT MADE AN EMERGENCY LANDING IN AN OPEN FIELD. THE AIRCRAFT CAME TO REST INVERTED. THE ARMY NATIONAL GUARD WAS CONDUCTING MANEUVERS AT THE TIME OF THE ACCIDENT AND RESCUED THE FLIGHT INSTRUCTOR AND STUDENT PILOT. THEY ALSO EXTINGUISHED A POSTIMPACT ENGINE FIRE.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.