CTHIn ForceLegislation
AD/ERJ-170/22 - FADEC Software
Embraer ERJ-170 Series AeroplanesEmbraer ERJ-170 Series Aeroplanes
Start here
Get a plain-English read of Embraer ERJ-170 Series Aeroplanes
Turn the raw legal text into a practical explanation grounded in AD/ERJ-170/22 - FADEC Software.
Embraer ERJ-170 Series Aeroplanes
| AD/ERJ-170/22 | FADEC Software | 5/2009 |
|---|
| Applicability: | Model ERJ 170-100 STD, ERJ 170-100 LR, ERJ 170-100 SU, ERJ 170-100 SE,ERJ 170-200 STD, ERJ 170-200 LR and ERJ 170-200 SU aeroplanes. |
|---|---|
| Requirement: | Replace the current engines full authority digital engine control (FADEC) software version by the new version V5.41 or any further FADEC software version approved by the Brazilian Agência Nacional de Aviação Civil (ANAC). |
| The detailed instructions and procedures to accomplish this AD are described in the Embraer Service Bulletin 170-73-0006 original issue, or further revisions approved by the ANAC. | |
| Note: ANAC AD 2008-03-01R2 refers. | |
| Compliance: | Within the next 1,200 hours time in service after the effective date of this Directive. |
| This Airworthiness Directive becomes effective on 7 May 2009. | |
| Background: | Initially, the ANAC had advised that instances have been reported of loss of thrust control due to problems in the Fuel Metering Valve (FMV) position feedback signal, which resulted in excessive thrust during some flight conditions. Such problems become critical during final approach flight phase. Since this condition affected flight safety, the AD/ERJ-170/16 required the FADEC software to be upgraded to version V5.40. |
| Since AD/ERJ-170/16 was issued the ANAC received reports of several instances of commanded in-flight shut down (IFSD) during use of FADEC with software version V5.40. Investigation has identified that these events linked to a logic error in software version V5.40. These IFSDs have a higher occurrence rate than the loss of thrust control events which resulted in the issue of AD/ERJ-170/16, therefore AD/ERJ-170/16 Amdt 1 was issued to require the FADEC software to be returned to version V5.30. | |
| FADEC software version V5.41 has now been issued with corrects the foregoing anomalies. This Directive requires the installation of software version V5.41. |
| This Directive supersedes AD/ERJ-170/16 Amdt 1 which will be cancelled. |
|---|