NTSB Identification: FTW90FA151B.
The docket is stored on NTSB microfiche number 44583.
Accident occurred Tuesday, August 07, 1990 in ELMENDORF, TX
Probable Cause Approval Date: 05/03/1993
Aircraft: NORTHROP T-38A, registration: USAF
Injuries: 1 Minor,3 Uninjured.
NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.
A USAF T-38 & A CESSNA 172 COLLIDED AT 4200' MSL. DRG IMPACT, THE VERTICAL STABILIZER OF THE T-38 STRUCK THE RGT SIDE OF THE 172'S ENG. THE ENG SEPD & THE 172 PLTS LNDD ON A ROAD. THE T-38 DSCNDD OUT OF CTL, BUT THE T-38 PLTS EJECTED SAFELY. BFR IMPACT, THE STUDENT IN THE 172 (WITH A VISION RESTRICTING DEVICE) & HIS INSTRUCTOR (CFI) WERE PRACTICING AIR WORK MNVRS. THE TANDEM SEAT T-38A (WITH AN INSTRUCTOR PLT IN THE BACK SEAT & A RATED PLT IN THE FNT SEAT) WERE BEING VECTORED FOR AN ILS RWY 33 APCH TO KELLY AFB. THE T-38'S SPD WAS ABOUT 330 KTS; THE SPD LIMITATION OF 250 KTS HAD BEEN WAIVED FOR T-38 ACFT, DUE TO THE ACFT'S LACK OF CONTROLLABILITY AT THE LOWER SPD. THE 172 WAS EQUIPPED WITH A TRANSPONDER, BUT IT WAS NOT EQUIPPED WITH MODE C. THE T-38 WAS EQUIPPED WITH A MODE C TRANSPONDER. BOTH ACFT WERE IN RADIO CTC WITH THE SAN ANTONIO SOUTH DEP CTLR, BUT ABT 3 MIN BFR THE COLLISION, RADAR SVC WITH THE 172 HAD BEEN TRMTD.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: INADEQUATE VISUAL LOOKOUT BY BOTH PILOTS IN THE T-38 AND BY THE INSTRUCTOR PILOT (CFI) IN THE CESSNA 172.
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