Grob (Germany)

Status Subject

Detail

Reference information

Contact:

Product support from Lindner TLB (took over from Grob) http://www.ltb-lindner.com/home.104.html

UK Agent Soaring Oxford 01636 525318 (Technical, Tim Dews, Airborne Composites 01985 840981 http://www.airbornecomposites.co.uk/ )

LBA Airworthiness Directives https://www.lba.de/EN/DivisionT/Airworthiness/ADs/ADs.html

EASA AD list http://ad.easa.europa.eu/

Grob ADs and TN/SBs spares and repair schemes from Lindner LTB http://www.ltb-lindner.com/grob-saleplanes.html

Single Seat Astir Series

M Fixed wheel variants Top harness attachments

reinforcement of wheel mount secure around transverse tube and through buckle 3 times

BGA Mod Astir/1/83 RS 306 & 320

Astir In Service Reports (Advisory)

Aileron connectors

disconnect & rods jam

Speed brake paddle

lever arm cracked

Aluminium fuselage main frames inspect frequently for cracks

Lower rudder hinge

(not CS) cracks in GRP

Elevator control rods

corroded in rear fuselage

Elevator vertical drive

loose rivets

Wing to fuselage attachments

balls missing (should be six per socket)

Retractable u/c hinge bars

circlips come off - replace with split pins

Undercarriage lever retaining bolt loose in GRP

Frame at base of the fin

fractured by ground loops - causes tail end flutter

Tow hook back release

If wire launched with adverse yaw may have difficulty Releasing

Page 1 BGA Compendium 07/07

TNS
04/83 12/87 & 01/93
10/87 & 08/79 03/82 & 12/83
04/84 06/85 08/87 08/87 10/87 12/98 & 06/88 06/92 06/95 & 04/95 02/00

Status Subject Tailplane mounting Tailplane location pins Tailplane mountings

Grob (Germany)

Detail

Reference information

Location ball thread cracked (AD inspection)

Flanges cracked

Continued problems with Spherical ball mounting. New mounting immanent.

CS only

Grob 102 Club Astir II, III & IIIb and Std Astir II & III

Speed Astir II & IIB

Twin Astir, Twin Astir Trainer, G-103 Twin II, G-103A Twin II Acro, G-103C Twin III & Twin III Acro

Twin Astir In Service Reports (Advisory)

Wheel brake back plate Rudder cables Airbrake lever failure (front) Side hinged rudders Aileron mass balance Tow hook Manual & placard amendments Rudder drive Wing to fuselage joiners Rudder cable pulleys Front rudder pedals (G 103C) Canopy jettison handles Rear release cable Airbrake over-centre adjustment Front rudder pedals
Page 2 BGA Compendium 07/07

torque stud fractured damaged at “S” bends failure delamination of fin skin at hinges cracks - inspect front mounting bracket cracked G-103C only failure at fork end at rudder inspect after ground loops cracked slide rod fractured disengaged from jettison systems - check jams between panel & coaming. Hook held open must be correct to avoid un-demanded opening mounting plate partial disbonding - inspect

TN 315-40

TNS 12/05 12/05 1/2006
07/78 06/84, 06/05
10/98 08/86 02/86 & 04/89 02/91 & 10/89 12/89 06/90 02/91 01/93 & 12/94 06/96 08/97 10/97 12/97 12/98

Status Subject Control cables
Grob G-103 Twin 3 SLMG

Grob (Germany)
Detail Cable release failed at swage at release hook arm

Reference information

Grob G-109 & G-109B M G109B - CAA flight manual change

quoted performance reduced

CAA Ref 1236/41491

R Flying controls R Flying controls

inspection of air brake control rod inspection of elevator control rod

BGA 022/10/2001 iss1 BGA 036/06/2003 iss1

G109 In Service Reports (Advisory)

Corrosion of bolts

in wing root attachments

Hot air shutter valves

cracked, failed & and butterfly screws loose

Rudder

bell crank cracked & failed

Pulleys in wheel brake system cracked replace nylon with aluminium

Tail wheel springs

damage rudder push-rod

Pitch change bolt failure

various causes detailed in TNS

Canopy jettison control

jammed by screws that attach roof trim

I Engine oil sump (G109 B)

Oil sump plug & oil cooler unions loose, check & wire lock

TNS 04/00
04/99
10/01 06/03
06/91 10/86, 12/92 & 10/91
08/92 04/94 06/97 02/98 06/98 06/03

Page 3 BGA Compendium 07/07