ALLSTAR PZL GLIDER Sp. z o.o.
ul. Cieszy ska 325 43-300 Bielsko-Bia"a
phone: +48 (0)33 8125021, fax: +48 (0)33 8123739 e-mail: office@szd.com.pl
GICA-CAIB Approval No P-023

ACCEPTED BY President of Allstar PZL Glider Sp. z o.o.

APPROVED BY EASA

on:

[---],

.

(signature, date)

Andrzej Papiorek, MSc. Eng.

AD No: 2006-0317 16 October 2006

MANDATORY BULLETIN No BE-057/SZD-50-3/2006 „PUCHACZ”

DESIGNATION-TYPE/MODEL: SZD-50-3 “PUCHACZ”

SERIA / NUMBER:

All gliders of SZD-50-3 “PUCHACZ” model

CONCERNS:

Introduction of an extra pull rod segment in the rudder control system

COMPLIANCE:

On receiving this Bulletin

ELABORATED BY:
Responsible for Type Design Marian Kroczek, MSc. Eng.
[---], (signature, date)

AGREED WITH Civil Aviation Office Southern Division, Krakow
[---], (signature, date)

Translated by
............... Tadeusz Zbo

Allstar PZL Glider Sp. z o.o.

MANDATORY BULLETIN No BE-057/SZD-50-3/2006 "PUCHACZ"

Page: 2 of: 3

1. SUBSTANCE OF THIS BULLETIN
Herewith, an extra segment of pull rod ((1) – Fig (1), of approx 140mm length “l”, is being introduced between the rear pedals (2) and turnbuckle (3) of pull rod connected to a rudder.

2. GROUNDS FOR ISSUANCE OF THIS BULLETIN This modification is aimed at elimination of the lateral load component applied at turnbuckle terminal by {pilot} foot. In several instances this has brought to fatigue failure and break of the terminal at the site of transition into eyelet.
3. LIST OF FACTORY NOS COVERED WITH THIS BULLETIN This Bulletin concerns all gliders of SZD-50-3 “PUCHACZ” model.
4. DESCRIPTION OF MODIFICATION 4.1 , On the gliders, where the eyelet terminal of the turnbuckle is connected directly to the
pedals, the terminals are to be disconnected from the left-, and right pedal and scrapped. The eyelet type terminals are to be replaced with fork type with the same thread (right/left hand). 4.2 Between the pedals (2) and turnbuckle (3), install a short pull rod (1) of aircraft type steel cable with 3 mm diameter core and approx 140mm length “l”. The length is to be adjusted so that the shield of the wheel brake pull rod (4), on a left side board, remains between the turnbuckle lateral screws (5) over the whole travel of turnbuckle (fore-aft). 4.3 Shorten the pull rods (6) connecting a rudder with rudder by a value obtained by adding the length of extra pull rod with a difference between the eyelet- and fork terminal lengths. 4.4 The M4 nuts, securing the connection between the pull rod and pedal are to be of a castellated, thin type with 1 mm diameter cotter pin.
5. PARTS NECESSARY FOR THE MODIFICATION The parts necessary for modification are available at Allstar PZL Glider, or substitutive aircraft parts may be used – capable to withstand a load of 6100N at minimum.
6. FINAL CONCLUSIONS 6.1 Entry on the compliance with this Bulletin is to be done at appropriate position in a Glider
Log Book. 6.2 For gliders, on which the extra pull rod segment described under item 4.2 has already been
introduced, this fact is to be recorded in a Glider Log Book. Item 4.4 of this Bulletin applies.

Allstar PZL Glider Sp. z o.o.

MANDATORY BULLETIN No BE-057/SZD-50-3/2004 "PUCHACZ"

Page: 3 of: 3

6.3 The revisions to Technical Service Manual, resulting of compliance with this Bulletin, will be contained in the next bulletin, concerning the revisions resulting of the model service life extension to 12000 flying hours.
6.4 The operator is introducing this Bulletin at his own cost.

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