A-90-028
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: REQUIRE MCDONNELL DOUGLAS TO DETERMINE BY TESTS, SIMULATION, AND/OR ANALYSES THE ACCELERATE-STOP DISTANCES FOR THE DC-10-30/40 AIRPLANE AS REQUIRED BY 14 CFR 25.109 (PRE-AMENDMENT 42) USING DEMONSTRATED CERTIFICATION STOPPING PERFORMANCE DATA FROM WORN BRAKES AND CURRENT PROCEDURES PRESCRIBED FOR REJECTED TAKEOFFS. ACCOUNT FOR DEMONSTRATED PILOT REACTION TIMES AND FOR DECELERATION DEVICE REACTION TIMES, SUCH AS ENGINE SP00L-DOWN TIME AND BRAKE FORCE RAMP UP TIME, IN THE DETERMINATION OF ACCELERATE-STOP DISTANCES AND ADD A DISTANCE SAFETY MARGIN FOR IN-SERVICE VARIATIONS AS DESCRIBED IN ADVISORY CIRCULAR 25-7 (CHAPTER 2, PARAGRAPHS 11.C.12.IV AND VII) TO BE EQUIVALENT AT LEAST TO A DISTANCE TRAVELED IN 2 SECONDS AT AN APPROPRIATE BRAKE-ON SPEED OR V1 SPEED.
In plain language (FlightFinder summary)
The NTSB asks the FAA to require McDonnell Douglas to calculate accelerate-stop distances for the DC-10-30/40 using worn-brake data and current rejected-takeoff procedures, including pilot and deceleration device reaction times, and to add a safety margin equal to at least 2 seconds of travel at the appropriate speed.
This plain-language summary is written by FlightFinder to explain the recommendation above. It is not the official wording — the verbatim NTSB text is quoted above.
Details
| Status | Closed - Unacceptable Action |
|---|---|
| Mode | Aviation |
| Closed | Feb 24, 1995 |
| NTSB number | FTW88NA106 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).