Today's Message Index:
----------------------
1. 06:00 PM - AD notes for Yaks & CJs (cjpilot710@aol.com)
2. 08:49 PM - Re: AD notes for Yaks & CJs (Walter Lannon)
3. 08:51 PM - Re: AD notes for Yaks & CJs (Dale)
4. 09:55 PM - Re: CJ-6 Engine trouble (jetjockey)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | AD notes for Yaks & CJs |
I know a goodly number of those on the Yak-list are not RPA members, and
thus most likely didn't get the email alert about two incidences involving a
Yak and a CJ.
I've copied the text only. I think its a good idea to share this info
right away.
Recently, an Australian Yak-52TW was in a descent at 240 MPH.
The aircraft had a sudden onset of an audible drone rapidly followed by a
loud bang. The aircraft then vibrated violently. The trim tab broke into
4 parts. Only one of the parts remained on the elevator. The trim tab push
rod also broke at the attachment point.
Notice the cracked elevator skin above the torque tube.
In addition to the trim tab and left elevator, the engine rubber mounts
were also broken.
A complete analysis of this incident is still pending. However, the RPA is
asking all TW owners specifically and all 52 owners in general to routinely
preflight all trim system components for wear and excessive play.
The elapsed time between the onset of the drone noise and the vibration was
1-2 seconds.
The pilot was able to slow the aircraft down and land without incident.
The aircraft was new in 2004 and only has 245 hours total time. the
aircraft is used for aerobatics less than 5% of the time and has been well
maintained.
The trim tab broke into 4 parts. Only one of the parts remained on the
elevator. The trim tab push rod also broke at the attachment point.
Notice the cracked elevator skin above the torque tube.
In addition to the trim tab and left elevator, the engine rubber mounts
were also broken.
A complete analysis of this incident is still pending. However, the RPA is
asking all TW owners specifically and all 52 owners in general to routinely
preflight all trim system components for wear and excessive play.
____________________________________________________________________________
____
Bill Blackwell notified Scott Andrews today of a cracked rudder
counterbalance weight tube he found while performing a conditional inspection.
Scott informed as many of the Phoenix area CJ owners as he could to inspect
their aircraft.
They found one aircraft with a welded patch on the counterbalance arm that
was probably done in China.
This picture shows the location of the crack.
It is below the rudder bell crank and just above the 90 degree support
bracket.
This picture shows the repair Bill made to the tube. It does not show the
crack he found.
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: AD notes for Yaks & CJs |
Pappy;
Could you post the photos? Very interested in the CJ balance arm crack.
Many thanks;
Walt
From: cjpilot710@aol.com
Sent: Thursday, October 11, 2012 5:57 PM
Subject: Yak-List: AD notes for Yaks & CJs
I know a goodly number of those on the Yak-list are not RPA members, and
thus most likely didn't get the email alert about two incidences
involving a Yak and a CJ.
I've copied the text only. I think its a good idea to share this info
right away.
Recently, an Australian Yak-52TW was in a descent at 240 MPH.
The aircraft had a sudden onset of an audible drone rapidly followed by
a loud bang. The aircraft then vibrated violently. The trim tab broke
into 4 parts. Only one of the parts remained on the elevator. The trim
tab push rod also broke at the attachment point.
Notice the cracked elevator skin above the torque tube.
In addition to the trim tab and left elevator, the engine rubber mounts
were also broken.
A complete analysis of this incident is still pending. However, the RPA
is asking all TW owners specifically and all 52 owners in general to
routinely preflight all trim system components for wear and excessive
play.
The elapsed time between the onset of the drone noise and the vibration
was 1-2 seconds.
The pilot was able to slow the aircraft down and land without incident.
The aircraft was new in 2004 and only has 245 hours total time. the
aircraft is used for aerobatics less than 5% of the time and has been
well maintained.
The trim tab broke into 4 parts. Only one of the parts remained on the
elevator. The trim tab push rod also broke at the attachment point.
Notice the cracked elevator skin above the torque tube.
In addition to the trim tab and left elevator, the engine rubber mounts
were also broken.
A complete analysis of this incident is still pending. However, the RPA
is asking all TW owners specifically and all 52 owners in general to
routinely preflight all trim system components for wear and excessive
play.
_________________________________________________________________________
_______
Bill Blackwell notified Scott Andrews today of a cracked rudder
counterbalance weight tube he found while performing a conditional
inspection.
Scott informed as many of the Phoenix area CJ owners as he could to
inspect their aircraft.
They found one aircraft with a welded patch on the counterbalance arm
that was probably done in China.
This picture shows the location of the crack.
It is below the rudder bell crank and just above the 90 degree support
bracket.
This picture shows the repair Bill made to the tube. It does not show
the crack he found.
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: AD notes for Yaks & CJs |
Only 240 mph? Why the slow down.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=385159#385159
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: CJ-6 Engine trouble |
Some years back my aircraft was mistakenly fueled with auto fuel containing ethanol.
The tainted fuel absolutely destroyed the carburetor diaphragm. The symptoms
you describe are exactly what I experienced. If you find a source for
replacement diaphragms, please post this information to the list as I cannot find
a source for them any longer.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=385165#385165
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|