A-90-025
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: REQUIRE MCDONNELL DOUGLAS TO DEMONSTRATE WITH SUFFICIENT ADDITIONAL TESTS, INCLUDING RUNWAY TESTS IF NECESSARY, THE SAFETY OF THE STEEL-ON-STEEL CONDITION THAT DEVELOPS WHEN THE DC-10-30/40 BRAKE FRICTION MATERIAL IS DEPLETED DURING A MAXIMUM KINETIC ENERGY REJECTED TAKEOFF (RTO) WITH BRAKES AT THE WEAR REPLACEMENT LIMIT BEFORE THE START OF THE RTO. FOR THE DEMONSTRATION, SIMULATE RUNWAY ROUGHNESS AND DYNAMIC INTERACTIONS BETWEEN THE AIRPLANE, LANDING GEARS, TIRES AND BRAKES.
In plain language (FlightFinder summary)
The FAA is asked to require McDonnell Douglas to conduct additional tests, including runway tests if necessary, to demonstrate the safety of the steel-on-steel condition that develops when the DC-10-30/40 brake friction material is depleted during a maximum kinetic energy rejected takeoff with brakes at the wear replacement limit. The demonstration must simulate runway roughness and dynamic interactions between the airplane, landing gears, tires, and brakes.
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 - Acceptable Alternate Action |
|---|---|
| Mode | Aviation |
| Closed | Oct 4, 1991 |
| 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).