A C421B on landing had the left main landing gear collapse. Found left main landing gear torque links assembled incorrectly. Aircraft incurred damage.

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Attributes
ACN	697931
Time
Date	200605
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : ilg.tower
Make Model Name	Golden Eagle 421
Operating Under FAR Part	Part 121
Flight Phase	landing : roll
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	other personnel other
ASRS Report	697931
Person 2
Affiliation	other
Function	maintenance : technician
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : published procedure non adherence : company policies non adherence : far
Independent Detector	other other : 4
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	performance deficiency : inspection performance deficiency : unqualified personnel performance deficiency : non compliance with legal requirements performance deficiency : installation
Supplementary
Problem Areas	Aircraft Chart Or Publication Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

We were planning on doing a part 135 trip but the pilot was unavailable. We used another non 135 pilot and did trip as a part 91 no charge trip. Maintenance personnel had put torque links on left main landing gear incorrectly together and during crosswind landing; gear dragged and collapsed; resulting in an incident. We were not operating within the operations specifications as they were only for single pilot operation. Money or compensation was never discussed.

Original NASA ASRS Text

Title: A C421B ON LNDG HAD THE L MAIN LNDG GEAR COLLAPSE. FOUND L MAIN LNDG GEAR TORQUE LINKS ASSEMBLED INCORRECTLY. ACFT INCURRED DAMAGE.

Narrative: WE WERE PLANNING ON DOING A PART 135 TRIP BUT THE PLT WAS UNAVAILABLE. WE USED ANOTHER NON 135 PLT AND DID TRIP AS A PART 91 NO CHARGE TRIP. MAINT PERSONNEL HAD PUT TORQUE LINKS ON L MAIN LNDG GEAR INCORRECTLY TOGETHER AND DURING XWIND LNDG; GEAR DRAGGED AND COLLAPSED; RESULTING IN AN INCIDENT. WE WERE NOT OPERATING WITHIN THE OPS SPECS AS THEY WERE ONLY FOR SINGLE PLT OP. MONEY OR COMPENSATION WAS NEVER DISCUSSED.

Data retrieved from NASA's ASRS site as of January 2009 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.