Hoppa till sidans innehåll

AD för Rotaxmotorer

11 JAN 2016 11:58
Ny AD för 912 och 914
  • Skapad: 11 JAN 2016 11:58

AD berör kontroll av cylindertopp, ATA 72 – Engine – Engine Cylinder Head – Inspection / Replacement.

 

Länk till AD

 

Reason:
A design change of the engine cylinder heads was introduced by BRP-Powertrain in March 2013 which modifies the engine/aircraft interfaces by substituting the previous cylinder head temperature (CHT) measurement (limit temperature 135°C/150°C) with a coolant temperature (CT) measurement (limit temperature 120°C).
The design change was communicated on 15 May 2013 by BRP-Powertrain Service Instruction (SI) 912-020R7/914-022R7 (single document) but was not identified by a change of the engine modeldesignation or of the engine P/N, but only through the cylinder head P/N and the position of the temperature sensor.
Consequently, engines with the new cylinder heads (installed during production or replaced in-service during maintenance) may be installed on an aircraft without concurrent modification of that aircraft, instructions for which should be provided by the Type Certificate (TC) holder or Supplemental Type Certificate (STC) holder, as applicable. In this case, the coolant temperature with a maximum engine operating limit of 120°C (valid for engines operated with water diluted glycol coolant) is displayed on a CHT indicator with a typical limit marking (red radial/range) of more than 120°C.
This condition, if not detected and corrected, will prevent the pilot to identify coolant limit exceedances, with subsequent loss of coolant (120°C is the boiling temperature of the coolant), which could lead to engine in-flight shut-down, possibly resulting in a forced landing, with consequent damage to the aircraft and injury to occupants.

 

For the reason stated above, this AD requires a one-time inspection to determine the actual engine configuration and, depending on findings, engine reidentification and (depending on TC or STC holder installation) modification of the affected aircraft. This also affects engines that are operated with waterless coolant.

Skribent: Henrik Svensson
Epost: This is a mailto link

 

Kontoret i Stockholm
Segelflyget c/o EAA Sverige
Hägerstalund
164 74 Kista
Tel: 0515-371 56
Fax: 08-751 98 16

Kontoret på Ålleberg
Segelflyget
Box 750
521 22 Falköping
Tel: 0515-371 51

Generella frågor kan e-postas
This is a mailto link

RST-online

Termikprognos

Logga-forbundskurser

Utsikt från verandan

Sikta Högre

Logga-Mayas-Shop

Banner_från-S-cert-till-FCL


DVD_omslag_banner

Visitors guide to Swedish airspace


Är du intresserad av segelflygutbildning?

Vi har samlat all information om segelflygutbildning under rubriken "Segelflygskola". Här hittar du information om våra centrala kurser liksom alla föreningars utbildningsutbud.
Till Segelflygskola

 Svedanor-logga

 Logga_SSF-CAMO

  Condor-RST

Logga_OLC

EGU_banner

 

Postadress:
Svenska Segelflygförbundet
Box 750
521 22 Falköping

Besöksadress:
Segelflygskolan Ålleberg
521 91 Falköping

Kontakt:
Tel: +4651537151, +4651537156
E-post: This is a mailto link

Se all info