SERVICE BULLETIN N° 25-001-b
SUPER PETREL XP · Service Bulletins
Overview
This service bulletin addresses issues related to the Excalibur-5 propeller mounted on the Super Petrel XP aircraft equipped with Rotax 915iS and 916iS engines. It specifically focuses on the tightening torque of the inner bolts that hold the propeller hubs, which has been adjusted to prevent breakage.
- Affects Excalibur-5 propeller on Super Petrel XP.
- Issues with breakage of 5 inner bolts reported.
- Tightening torque changed from 11 Nm to 8 Nm.
- Only the inner bolts require torque adjustment.
- Correct torque ensures safety and longevity of the assembly.
- Use only supplied bolts for assembly.
- Follow the user mounting manual strictly.
- Tighten bolts in a star pattern.
Document
Source
Originally published by com.br. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type ·
- Service Bulletins
- Year ·
- 2025
- File size ·
- 434 KB
- Publisher ·
- com.br
- Language ·
- en
Specifications & performance
Extracted from this document.
Specifications
- Inner bolt count ·
- 5
- Inner bolt length steel ·
- M6x25mm
- Inner bolt length titanium ·
- M6x22mm
What is the SERVICE BULLETIN N° 25-001-b?
The SERVICE BULLETIN N° 25-001-b is a service bulletins for the SUPER PETREL XP, dated 2025.
Where does the SERVICE BULLETIN N° 25-001-b come from?
This copy of the SERVICE BULLETIN N° 25-001-b was originally published by com.br and is hosted on Sprinkle as a free, searchable reference copy.
What year was the SERVICE BULLETIN N° 25-001-b published?
The SERVICE BULLETIN N° 25-001-b — the SUPER PETREL XP service bulletins on file — is dated 2025.
Most owners only have the POH. Here's the essential set for the SUPER PETREL XP.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins on file
- Type Certificate (TCDS)
More SUPER PETREL XPmanuals & documents
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In this document
Context
Several cases of bolt breakage have occurred on the Super Petrel XP aircraft with Rotax 915iS and 916iS engines, specifically concerning the inner bolts that hold the hubs.
Corrective Actions
The tightening torque of the 5 inner bolts has been changed from 11 Nm to 8 Nm. This requires loosening the bolts completely and then tightening them to the new torque specification.
Reminder
It is crucial to ensure propeller bolts are correctly tightened for user safety. The E-Props Propeller Assembly and Maintenance Manual should be followed.
Best Practices
Use supplied bolts, follow the user mounting manual, respect the tightening torque, and tighten bolts in a star pattern to avoid excessive stress.
Safety notes
- Incorrect torque can lead to bolt loosening or breakage.
- Use of non-supplied bolts is strictly prohibited.
- Thread lock usage is prohibited on certain propellers.
- Tightening must be done with a calibrated torque wrench.
Full document text
Service Bulletin Ref : 25-001-b Date : 16-10-2025 Page 1 / 3 SERVICE BULLETIN N° 25-001-b Date 16-10-2025 Propellers affected This SB concern exclusively the Excalibur-5 (5 bladed propeller) when mounted on the Super Petrel XP with the Rotax 915iS and 916iS engines SB subject Reported case of breakage on the 5 inner bolts holding the hubs Required action Set the tightening torque of the 5 inner bolts to 8 Nm (previously 11Nm) Issued by Nicolas Parrein Signed by Jérémie Buiatti 1. CONTEXT Several cases of bolt breakage have occurred on the Super Petrel XP aircraft when equipped with the Rotax 915iS and Rotax 916iS engines (Fig.1). Fig. 1 Excalibur-5 on a Super Petrel XP ELECTRAVIA - HELICES E-PROPS - www.e-props.fr SAS au capital de 100.000 € - SIRET : 50808662600027 RCS MANOSQUE - APE : 3030Z 195, Route de l'Aviation – ZI Aérodrome de Sisteron – 04200 VAUMEILH (France) Tel : +33 (0) 4 92 34 00 00 - Email : helices@e-props.fr Service Bulletin Ref : 25-001-b Date : 16-10-2025 Page 2 / 3 It concerns only the inner bolts that hold the hubs together (Fig.2). Fig.2 inner bolt that require a tightening torque adjustment These bolts are under a lot of stress, witch is amplified by vibrations of the airflow due to the aerodynamics of the Super Petrel. To ensure that the bolt does not exceed their stress limit, their tightening torque has to be reduced. This tightening torque change does not affect the blade retention or the safety of the assembly. 2. CORRECTIVE ACTIONS Change of the tightening torque of the 5 inner bolts only. Impacted parts Bolts located in the center of the hub in steel : 5x M6x25mm in titanium : 5x M6x22mm Modification Change of the tightening torque: 11Nm → 8 Nm To do so, start by loosening the bolts completely, and then tighten them to 8 Nm using a calibrated torque wrench. Additional information The tightening torque of the other bolts is not changed. Service Bulletin Ref : 25-001-b Date : 16-10-2025 Page 3 / 3 3. REMINDER It is very important to ensure that propeller bolts are correctly tightened to guarantee user safety. Please note that the E-Props Propeller Assembly and Maintenance Manual is provided with each new propeller; the latest updated version of this document is published on the company's website: www.e-props.fr / AIRCRAFT / MANUALS In addition, here are some best practices for tightening the bolts on our propellers: Use the supplied bolts The bolts supplied with the propeller have specific quality, length and threading. This is essential to ensure correct assembly and tightening. It is strictly prohibited to use other bolts than the one supplied with the propeller. Follow the user mounting manual There are different ways to tighten bolts (washers, thread lock, etc…). We specify an assembly and it must be strictly adhered to. For instance, on the Durandal / Excalibur propellers, usage of thread lock is prohibited. Respect the tightening torque The tightening of any bolt has to be done with a calibrated torque wrench. If the fastening torque is too low, the bolt might get → loose. If the fastening torque is too high, the bolt might → break over time. Star shape pattern tightening Propeller bolts must be tightened in a star shaped pattern so that no single bolt is subjected to excessive stress during tightening (or loosening). This is a very important operation to ensure the longevity of the propeller bolts.