PPRuNe Forums - View Single Post - Automatic prevention of flap extension on ATR?!?!?
Old 4th Mar 2009, 11:42
  #4 (permalink)  
Mansfield
 
Join Date: Jan 2007
Location: Vermont
Age: 67
Posts: 200
Likes: 0
Received 0 Likes on 0 Posts
The full report is available at this URL:

http://www.ntsb.gov/publictn/1996/AAR9601.pdf

Volume 2, the BEA response, is at

http://www.ntsb.gov/publictn/1996/AAR9602.pdf

Beware of slow connections...both are pretty long.

The following reference in the NTSB report is on page 25:
The MFC also monitors the trailing edge flaps and sounds an alarm if the
airplane exceeds an airspeed of 185 knots with the flaps extended at the 15-degree position. If the flaps are in the retracted position, the MFC will inhibit flap extension above an indicated airspeed of 180 knots (KIAS). After this accident, ATR Service Bulletin (SB) ATR 72-27-1039, dated January 12, 1995, provided a means to remove the flap extension inhibit logic so that flightcrews could select flap extensions in emergencies above 180 KIAS.
Mansfield is offline