Kept high on the arrival; the captain (pilot not flying) of an MD10/11 tried to assist the first off...

Attributes
ACN	906591
Time
Date	201008
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZZ.Airport
State Reference	FO
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Make Model Name	DC-10 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Component
Aircraft Component	Gear Extend/Retract Mechanism
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 56 Flight Crew Total 5600 Flight Crew Type 650
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy Deviation - Speed All Types

Narrative:

I was the first officer and pilot flying on the ILS/15 approach into ZZZZ. During arrival; ATC requested we remain at 17;000 for some time to avoid traffic. This put us high on the arrival. I recognized the situation; so I selected full speed brakes. We were cleared for the approach which allowed up down to 12;200 on an enroute segment; and I planned to put the gear down (early) at that altitude once we slowed below gear limiting speed.the captain did not recognize we were above gear limiting speed and in an attempt to 'help' put the gear down without first confirming the action with me. I was unable to get out my 'no!' before he already had the gear down. I estimate we oversped the gear by at least 10-20 KTS. I asked for and received a right 360 to lose altitude in VMC conditions and we continued the arrival/approach without further incident.after shutdown we debriefed the situation in great detail and discussed techniques to prevent a recurrence. The captain wrote the overspeed up in the logbook and requested a gear inspection be made prior to our next leg. Mechanics informed us the inspection revealed no anomalies.

Original NASA ASRS Text

Title: Kept high on the arrival; the Captain (pilot not flying) of an MD10/11 tried to assist the First Officer's attempts to get down by unilaterally extending the landing gear. Unfortunately; he did so well above the maximum gear extension speed and an overspeed inspection was necessary.

Narrative: I was the First Officer and pilot flying on the ILS/15 Approach into ZZZZ. During arrival; ATC requested we remain at 17;000 for some time to avoid traffic. This put us high on the arrival. I recognized the situation; so I selected full speed brakes. We were cleared for the approach which allowed up down to 12;200 on an enroute segment; and I planned to put the gear down (early) at that altitude once we slowed below gear limiting speed.The Captain did not recognize we were above gear limiting speed and in an attempt to 'help' put the gear down without first confirming the action with me. I was unable to get out my 'no!' before he already had the gear down. I estimate we oversped the gear by at least 10-20 KTS. I asked for and received a right 360 to lose altitude in VMC conditions and we continued the arrival/approach without further incident.After shutdown we debriefed the situation in great detail and discussed techniques to prevent a recurrence. The Captain wrote the overspeed up in the logbook and requested a gear inspection be made prior to our next leg. Mechanics informed us the inspection revealed no anomalies.

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.

Kept high on the arrival; the captain (pilot not flying) of an MD10/11 tried to assist the first officer's attempts to get down by unilaterally extending the landing gear. Unfortunately; he did so well above the maximum gear extension speed and an overspeed inspection was necessary.