Air carrier medium large transport landed with less than normal flap extension when flaps had to be extended by alternate procedure.

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Attributes
ACN	146139
Time
Date	199005
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : tus
State Reference	AZ
Altitude	msl bound lower : 5000 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : tus
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent other landing other
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 15000 flight time type : 3000
ASRS Report	146139
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency flight crew : overcame equipment problem none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

While making a visibility approach to tus, the flaps and leading edge devices failed to extend normally. Used alternate flap operation for this abnormal operations. But was only able to get maximum of 10 degrees of flaps. The book recommended flaps for this operation is 15 degree. Landing was uneventful and taxied to gate.

Original NASA ASRS Text

Title: ACR MLG LANDED WITH LESS THAN NORMAL FLAP EXTENSION WHEN FLAPS HAD TO BE EXTENDED BY ALTERNATE PROC.

Narrative: WHILE MAKING A VIS APCH TO TUS, THE FLAPS AND LEADING EDGE DEVICES FAILED TO EXTEND NORMALLY. USED ALTERNATE FLAP OPERATION FOR THIS ABNORMAL OPS. BUT WAS ONLY ABLE TO GET MAX OF 10 DEGS OF FLAPS. THE BOOK RECOMMENDED FLAPS FOR THIS OPERATION IS 15 DEG. LNDG WAS UNEVENTFUL AND TAXIED TO GATE.

Data retrieved from NASA's ASRS site as of July 2007 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.