---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Sat 03/26/11: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:35 AM - FW: Yak-52 elevator failure (pilko2) 2. 04:03 PM - Re: Yak-52 elevator failure (Walter Lannon) 3. 04:27 PM - Re: Yak-52 elevator failure (William Halverson) 4. 08:20 PM - Re: Yak-52 elevator failure (Walter Lannon) 5. 08:37 PM - CJ6 Shimmy damper problems (CJ6XXK) ________________________________ Message 1 _____________________________________ Time: 05:35:56 AM PST US From: "pilko2" Subject: FW: Yak-List: Yak-52 elevator failure Trawling the website of Yak UK reveals this to be a well known gotcha. http://www.yakuk.com/2000-004.doc MPD: 2000-004 Subject: Crack in elevator control system pulley. Applicability: Yakovlev/ Aerostar or a SA Y B AK 52 aircraft. Reason: A 19 mm crack has been discovered in the elevator actuation part number 5251 or 00-80-3 (referred to as "lever" in the Romanian parts catalogue). The failure of this component could result in loss of the elevator control. Compliance: Within 50 hours from the effective date of this MPD, inspect elevator actuation pulley parts number 525100-80-34 cracking on its periphery below the attachment for the balance weight bracket, at the point where the section reduces from a 10 mm to 7 mm. Inspect using dye penetrant techniques. if the component is cracked, replace it before Further Flight. Repeat this inspection annually at renewal of the permit to fly. Sector ________________________________ Message 2 _____________________________________ Time: 04:03:59 PM PST US From: Walter Lannon Subject: Re: Yak-List: Yak-52 elevator failure Interesting! How much weight is attached to this part? And for what purpose? Walt ----- Original Message ----- From: pilko2 To: yak-list@matronics.com Sent: Saturday, March 26, 2011 5:25 AM Subject: FW: Yak-List: Yak-52 elevator failure Trawling the website of Yak UK reveals this to be a well known gotcha. http://www.yakuk.com/2000-004.doc MPD: 2000-004 Subject: Crack in elevator control system pulley. Applicability: Yakovlev/ Aerostar or a SA Y B AK 52 aircraft. Reason: A 19 mm crack has been discovered in the elevator actuation part number 5251 or 00-80-3 (referred to as "lever" in the Romanian parts catalogue). The failure of this component could result in loss of the elevator control. Compliance: Within 50 hours from the effective date of this MPD, inspect elevator actuation pulley parts number 525100-80-34 cracking on its periphery below the attachment for the balance weight bracket, at the point where the section reduces from a 10 mm to 7 mm. Inspect using dye penetrant techniques. if the component is cracked, replace it before Further Flight. Repeat this inspection annually at renewal of the permit to fly. http://www.matronics.com/Navigator?Yak-Listhttp://forums.matronics.comhttp://www.matronics.com/contribution ________________________________ Message 3 _____________________________________ Time: 04:27:05 PM PST US From: "William Halverson" Subject: Re: Yak-List: Yak-52 elevator failure Well, the part is cracking on the upper side ... would it be due to aggressive pull back forces on the stick? +-----Original Message----- +From: Walter Lannon [mailto:wlannon@persona.ca] +Sent: Saturday, March 26, 2011 04:00 PM +To: yak-list@matronics.com +Subject: Re: Yak-List: Yak-52 elevator failure + +Interesting! + +How much weight is attached to this part? And for what purpose? + +Walt + ----- Original Message ----- + From: pilko2 + To: yak-list@matronics.com + Sent: Saturday, March 26, 2011 5:25 AM + Subject: FW: Yak-List: Yak-52 elevator failure + + + + + Trawling the website of Yak UK reveals this to be a well known gotcha. + + + + http://www.yakuk.com/2000-004.doc + + + + + + + + MPD: 2000-004 + + + Subject: Crack in elevator control system pulley. + + + + Applicability: Yakovlev/ Aerostar or a SA Y B AK 52 aircraft. + + + + Reason: A 19 mm crack has been discovered in the elevator actuation part number 5251 or 00-80-3 (referred to as "lever" in the Romanian parts catalogue). The failure of this component could result in loss of the elevator control. + + + + Compliance: Within 50 hours from the effective date of this MPD, inspect elevator actuation pulley parts number 525100-80-34 cracking on its periphery below the attachment for the balance weight bracket, at the point where the section reduces from a 10 mm to 7 mm. Inspect using dye penetrant techniques. if the component is cracked, replace it before Further Flight. Repeat this inspection annually at renewal of the permit to fly. + + + + + + + + + + + + http://www.matronics.com/Navigator?Yak-Listhttp://forums.matronics.comhttp://www.matronics.com/contribution + ________________________________ Message 4 _____________________________________ Time: 08:20:25 PM PST US From: Walter Lannon Subject: Re: Yak-List: Yak-52 elevator failure Possibly. The crack is originating at the section change where loads would tend to concentrate but it may also be subject to bending loads from the balance weight attached to the upper, heavier, section. Possibly rudder induced transverse loading? I don't understand the use of a balance weight in this location. Walt ----- Original Message ----- From: "William Halverson" Sent: Saturday, March 26, 2011 4:21 PM Subject: Re: Yak-List: Yak-52 elevator failure > > > Well, the part is cracking on the upper side ... would it be due to > aggressive pull back forces on the stick? > > > +-----Original Message----- > +From: Walter Lannon [mailto:wlannon@persona.ca] > +Sent: Saturday, March 26, 2011 04:00 PM > +To: yak-list@matronics.com > +Subject: Re: Yak-List: Yak-52 elevator failure > + > +Interesting! > + > +How much weight is attached to this part? And for what purpose? > + > +Walt > + ----- Original Message ----- > + From: pilko2 > + To: yak-list@matronics.com > + Sent: Saturday, March 26, 2011 5:25 AM > + Subject: FW: Yak-List: Yak-52 elevator failure > + > + > + > + > + Trawling the website of Yak UK reveals this to be a well known gotcha. > + > + > + > + http://www.yakuk.com/2000-004.doc > + > + > + > + > + > + > + > + MPD: 2000-004 > + > + > + Subject: Crack in elevator control system pulley. > + > + > + > + Applicability: Yakovlev/ Aerostar or a SA Y B AK 52 aircraft. > + > + > + > + Reason: A 19 mm crack has been discovered in the elevator actuation > part number 5251 or 00-80-3 (referred to as "lever" in the Romanian parts > catalogue). The failure of this component could result in loss of the > elevator control. > + > + > + > + Compliance: Within 50 hours from the effective date of this MPD, > inspect elevator actuation pulley parts number 525100-80-34 cracking on > its periphery below the attachment for the balance weight bracket, at the > point where the section reduces from a 10 mm to 7 mm. Inspect using dye > penetrant techniques. if the component is cracked, replace it before > Further Flight. Repeat this inspection annually at renewal of the permit > to fly. > + > + > + > + > + > + > + > + > + > + > + > + > http://www.matronics.com/Navigator?Yak-Listhttp://forums.matronics.comhttp://www.matronics.com/contribution > + > > > ________________________________ Message 5 _____________________________________ Time: 08:37:26 PM PST US Subject: Yak-List: CJ6 Shimmy damper problems From: "CJ6XXK" I just done some high speed taxi runs in my cj6 today and have a few problems. First thing is that i raise the the nose of the plane then put it down again and i have got massive amounts of shimmy. This was a brand new shimmy damper i bought and fitted as well. Is there a special way to set them up? Thanks Daniel Read this topic online here: http://forums.matronics.com/viewtopic.php?p=335149#335149 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message yak-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Yak-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/yak-list Browse Digests http://www.matronics.com/digest/yak-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.