An A320's landing gear did not extend when the gear handle was lowered. A go-around was accomplished...

Attributes
ACN	847795
Time
Date	200908
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	Marginal
Aircraft 1
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	Final Approach Initial Approach
Flight Plan	IFR
Component
Aircraft Component	Gear Extend/Retract Mechanism
Person 1
Function	Pilot Flying First Officer
Experience	Flight Crew Last 90 Days 30 Flight Crew Total 8490 Flight Crew Type 6850
Person 2
Function	Pilot Flying Captain
Experience	Flight Crew Last 90 Days 200 Flight Crew Total 10000 Flight Crew Type 3300
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

At the FAF on the ILS; called for gear down; managed speed; final descent checklist. Once the landing gear handle was down; the gear indicator lights were out and there were no gear indications on the lower ECAM screen except for the landing gear doors; which were indicated in amber. Flew a low approach; where the control tower stated that the gear doors were open; but no gear indications. Accomplished a missed approach to avoid flying over prohibited area. At 2000 ft and a heading of 090; captain assumed control of aircraft and I became the pilot not flying. We coordinated with ATC to divert and declared an emergency. Sent dispatch an ACARS to notify him of our situation and divert. Accomplished gear alternate extension ECAM instructions and followed up with checklist. Flew the ILS to an approach and landing. Accomplished the after landing checklist and the tow in checklist.

Original NASA ASRS Text

Title: An A320's landing gear did not extend when the gear handle was lowered. A go-around was accomplished followed by a diversion to a nearby airport and an emergency declaration. The gear extended with the Gear Alternate Extension Checklist.

Narrative: At the FAF on the ILS; called for Gear Down; Managed Speed; Final Descent Checklist. Once the landing gear handle was down; the gear indicator lights were out and there were no gear indications on the lower ECAM screen except for the landing gear doors; which were indicated in amber. Flew a low approach; where the Control Tower stated that the gear doors were open; but no gear indications. Accomplished a missed approach to avoid flying over prohibited area. At 2000 FT and a heading of 090; Captain assumed control of aircraft and I became the pilot not flying. We coordinated with ATC to divert and declared an emergency. Sent dispatch an ACARS to notify him of our situation and divert. Accomplished Gear Alternate Extension ECAM instructions and followed up with checklist. Flew the ILS to an approach and landing. Accomplished the after landing checklist and the tow in checklist.

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.

An A320's landing gear did not extend when the gear handle was lowered. A go-around was accomplished followed by a diversion to a nearby airport and an emergency declaration. The gear extended with the gear alternate extension checklist.