B757 captain experiences speed brakes cycling between extend and retracted during landing with the i...

Narrative:

During normal landing the speed brakes deployed halfway then retracted; then deployed again halfway only to retract. We deployed the speed brakes manually. The retraction of the speed brakes probably caused the auto-brakes to disarm. I attempted to deploy the thrust reversers; but only got the unlock amber on the left reverser. We never got the green thrust reverser light on the left reverser while on the runway. We never got either the amber or green reverser light on the right thrust reverser. Due to landing in the first third of the runway on speed and sink; the landing only required a little additional braking due to manual deployment of the speed brakes. We wrote up all three items in the logbook which took the aircraft out of service.

Original NASA ASRS Text

Title: B757 Captain experiences speed brakes cycling between extend and retracted during landing with the inability to select reverse thrust. The speed brakes are extended manually and the aircraft is stopped without difficulity.

Narrative: During normal landing the speed brakes deployed halfway then retracted; then deployed again halfway only to retract. We deployed the speed brakes manually. The retraction of the speed brakes probably caused the auto-brakes to disarm. I attempted to deploy the thrust reversers; but only got the unlock amber on the left reverser. We never got the green thrust reverser light on the left reverser while on the runway. We never got either the amber or green reverser light on the right thrust reverser. Due to landing in the first third of the runway on speed and sink; the landing only required a little additional braking due to manual deployment of the speed brakes. We wrote up all three items in the logbook which took the aircraft out of service.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	968400
Time
Date	201108
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZZ.Airport
State Reference	FO
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	Landing
Flight Plan	IFR
Component
Aircraft Component	Squat Switch
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe

B757 captain experiences speed brakes cycling between extend and retracted during landing with the inability to select reverse thrust. The speed brakes are extended manually and the aircraft is stopped without difficulity.