PPRuNe Forums - View Single Post - Positive Rate
Thread: Positive Rate
View Single Post
Old 23rd Jun 2020, 16:45
  #11 (permalink)  
Denti
 
Join Date: Mar 2001
Location: I wouldn't know.
Posts: 4,497
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by vilas
Airbus FCOM or FCTM do not give any guidance about where to check +ve climb.
Yes, i was surprised when i discovered that. Of course, when reading this discussion i checked both the FCTM and the FCOM and found: nothing. Every little thing is defined, but not what positive climb exactly is.

And i just checked my old 737 FCOM (which is a pretty old version as i transitioned 6 years ago to the A320) and that is what it has to say:

"Do not retract the landing gear until a positive climb is indicated on the altimeter, preferably radio altimeter. Because of ground effect the altimeter may not show a positive climb until the airplane is 35 to 50 ft above the runway. Undue haste in retracting the gear is neither necessary nor desirable."

Especially the last sentence is in my view quite important. Otherwise, the result shown above might happen. Or a Dash-8 on its belly in SCN because the FO retracted the gear too early.
Denti is offline