Page:NTSB Report, 1967 Lear Jet crash.pdf/14

- 11 - Very little of the aircraft instrument panel was recovered Both vertical gyro indicators were displaying a straight and level flight attitude. The "Off" flag drive gear of one was in the power off position and the flag had been imprinted on the instrument face. The flag and drive gear from the other instrument had been torn loose. One Collins 331A course line indicator was found with the compass card indicating 260 degrees and the heading index impacted into the compass card between 260 and 270 degrees. One radio magnetic indicator instrument dial face was recovered with impact markings from the "T—shaped" flange and adjacent gears behind the face oriented in such a way that the face was indicating 360 degrees at the time of impact. An omni bearing indicator assembly was frozen by impact at 260 degrees. All these instruments are AC powered and retain the presentation being displayed when electrical power is removed.

1.13 Fire

Fire damage or sooting was observed on approximately 10 percent of the wreckage, but there was no evidence of pre-impact fire.

1.14 Survival Aspects

This was a nonsurvivable accident.

1.15 Tests and Research

Flight testing of the radar coverage over the crash site revealed a minimum reception altitude of 2,100 feet m's l. The estimated point of target loss on radar was approximate1y 3/4-mile south of the crash site

1.16 Other

AC electrical power is developed in the Lear Jet by two 115 volt, 400 cycle static inverters, each capable of delivering 250 volt-amperes. The