Hi all,

With IR 2 inop (available only in ATT mode), the MEL says not to perform T/O in CONF1+F, could someone pls tell me the reason ?

Best regards

lion

Hi,
Think it has something to do with the Auto Flap Retraction protection (which is lost if take off is performed with this scenario).
FP

Try this from AI a couple of years ago when I asked the same question.

Uncommanded Flap Retraction during Take Off.

Situation
An aircraft (320) was dispatched with SFCS No 2 SLAT Channel de-activated iaw MMEL 01-27-51-01 B.

SFCS No 2 FLAP Channel has validated an intermittent high computed airspeed from ADIRU 1. As the aircraft was in Config 1+F, the SFCS No 2 FLAP Channel engaged the FLAP Auto Command to retract the flap. The auto command is available only in Config 1+F with airspeed above 210 kts. SFCS No 2 FLAP Channel was unable to crosscheck the airspeed coming from No 1 ADIRU with the ADIRU 2 airspeed coming from SFCS No 2 SLAT Channel (INOP iaw MMEL above).

The same condition would occur if dispatched with ADR/IR 2 inop, having selected the rotary switch to off.

O.K. that seems to explain it. Thanks so much FlapsOne.
Cheers!

srilion