A mechanic reports about a cirrus SR20 aircraft right main tire losing pressure on landing. He had r...

Narrative:

The aircraft was being used for IFR flight training. Upon landing; the instructor felt that the right main tire was losing pressure and felt like it was flat. The landing was described as very smooth. The aircraft was brought to a gentle stop on runway. The aircraft was shut down and towed to the FBO (fixed based operator). There was no damage to the aircraft; only a flat tire. The right main tire was removed and it was found that there was a one to two cm puncture in the tube. The aircraft had been towed with the flat tire; so it is hard to determine if other cracking present in the tube was caused by the towing; or was present beforehand. A new tube and serviceable tire were installed on the aircraft and it was test flown satisfactorily. Both main tires had been replaced by me approximately seven months prior; but the tubes had not been replaced at that time. Although the tubes were deemed to be serviceable and airworthy at that time; I believe that it probably would have been prudent to change out the tubes at tire change regardless of their condition. I am planning on changing the left main tire tube as soon as possible. Total time on the tube is unknown; but the tire change had been done approximately 100 hours ago.

Original NASA ASRS Text

Title: A Mechanic reports about a Cirrus SR20 aircraft right main tire losing pressure on landing. He had replaced both main tires seven months earlier; but the inner tubes were considered serviceable and reinstalled.

Narrative: The aircraft was being used for IFR flight training. Upon landing; the instructor felt that the right main tire was losing pressure and felt like it was flat. The landing was described as very smooth. The aircraft was brought to a gentle stop on runway. The aircraft was shut down and towed to the FBO (Fixed Based Operator). There was no damage to the aircraft; only a flat tire. The right main tire was removed and it was found that there was a one to two cm puncture in the tube. The aircraft had been towed with the flat tire; so it is hard to determine if other cracking present in the tube was caused by the towing; or was present beforehand. A new tube and serviceable tire were installed on the aircraft and it was test flown satisfactorily. Both main tires had been replaced by me approximately seven months prior; but the tubes had not been replaced at that time. Although the tubes were deemed to be serviceable and airworthy at that time; I believe that it probably would have been prudent to change out the tubes at tire change regardless of their condition. I am planning on changing the left main tire tube as soon as possible. Total time on the tube is unknown; but the tire change had been done approximately 100 hours ago.

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	918842
Time
Date	201011
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	SR20
Operating Under FAR Part	Part 91
Flight Phase	Landing
Component
Aircraft Component	Main Gear Tire
Person 1
Function	Technician
Qualification	Maintenance Airframe Maintenance Powerplant Maintenance Inspection Authority
Experience	Maintenance Inspector 1 Maintenance Lead Technician 28
Events
Anomaly	Aircraft Equipment Problem Critical

A mechanic reports about a cirrus SR20 aircraft right main tire losing pressure on landing. He had replaced both main tires seven months earlier; but the inner tubes were considered serviceable and reinstalled.