BULLETIN

Page 1

WYTWÓRNIA SPRZĘTU KOMUNIKACYJNEGO

„PZL - Rzeszów” S.A.

Hetmańska 120

35-078 RZESZÓW; POLAND

TEL: (0-17) 8546100, 8546200, FAX: (0-17) 8620750

Certificates: PL.21G.0001, PL.145.001, EASA.21J.115

The technical content of this document is 

approved under the authority of DOA no. 

EASA. 21J.115

OBLIGATORY BULLETIN No E-19W123/DOA/2007

DESIGNATION - TYPE / MODEL: PZL-10W Engine

SERIES / NUMBER: The ALRP-5 fuel metering pumps of the serial numbers specified 

herein.

REFERS TO: The ALRP-5 fuel fine filter inspection for metal chips occurrence. 

 

DATE OF IMPLEMENTATION:Immediately after obtaining this bulletin. 

 

Rzeszów, May 2007

Property of

WYTWÓRNIA SPRZĘTU KOMUNIKACYJNEGO

„PZL - Rzeszów” S.A.

All rights reserved
BULLETIN

Page 2

SECTION I

Reason

The review of manufacturing process and service experience has shown that the ALRP-5 Fuel 

Metering Pumps units released to service between May 2006 and April 2007 can be vulnerable 

for seizing. This vulnerability is demonstrated by occurrence of aluminum and bronze chips at 

the fine filter.

Action

Because of the above there is a need for additional inspections of the ALRP-5 Fuel Metering 

Pump Fine Filter to verify the proper operation of pump assembly.

Applicability

ALRP-5 Fuel Metering Pumps of the following serial numbers:

Item ALRP-5 fuel metering pump 

serial number Item ALRP-5 fuel metering pump serial number

1 PB 99040002 21 PB 94110002

2 PB 98050002 22 PB 93080005

3 PA 058701B 23 PB 93120002

4 PB 99020003 24 PB 97070003

5 PB 97010002 25 PA 07927B

6 PA 02914B 26 PB 96080005

7 PA 11881B 27 PB 07010001

8 PB 94020003 28 PB 07010002

9 PB 93050006 29 PA 04891B

10 PA 06918B 30 PA 11892B

11 PA 07912B 31 PA 10903B

12 PB 02935 32 PA 02915B

13 PB 94030003 33 PA 02903B

14 PB 93120004 34 PA 06891B

15 PA 05913B 35 PB 97050002

16 PB 95020005 36 PA 07882B

17 PB 97030004

18 PB 97060001

19 PB 99040001

20 PB 95050003

(In the following text: ”ALRP-5 pump” indicates “ALRP-5 Fuel Metering Pump”).
BULLETIN

Page 3

SECTION II

1. Procedure.

1.1 ALRP-5 pumps having time in service of more than 30 hours and mounted at the 

PZL-10W Engine being installed on helicopter:

Inspect the pump fine filter:

• If result of the inspection is positive (no chips found) - continue the service. 

Repeat the inspection after next 50 hours of service. 

If no chips found, follow the inspections according to Engine Maintenance 

Manual schedule; 

• If result of the inspection is negative - the pump should be withdrawn from 

service for repair in „PZL-Hydral” S.A.

1.2. ALRP-5 pump having time in service of less or equal to 30 hours and mounted at the 

PZL-10W Engine being installed on helicopter:

Inspect the pump fine filter:

• If result of the inspection is positive (no chips found) - continue the service. 

Inspect the filter after each flight day but no more than 4 hours between 

inspections until 30 hours of time in service.

Repeat the inspection after next 50 hours of service. 

If no chips found, follow the inspections according to Engine Maintenance 

Manual schedule; 

• If result of the inspection is negative - the ALRP-5 pump should be withdrawn 

from service for repair in „PZL-Hydral” S.A.

1.3. ALRP-5 pumps mounted at the engine packed into a box and the loose spare pumps.

Contact „PZL-Hydral” S.A. (fax no +48 71 324 5078 ) and WSK “PZL-Rzeszów” S.A. 

(+48 17 866 7244) (give the pump serial number or engine serial number, if applicable) 

for the arrangement of the corrective action.

CAUTION: In the case when two of the fuel pumps listed above are installed at the same 

helicopter, replace one of the pumps for the other not listed above, 

irrespective from the result of inspection.

2. Procedure for the fine filter cleanliness checking:

2.1 Take out the fine filter from the ALRP-5 pump according to the PZL-10W Maintenance 

Manual, Document No 19.0.400, Section 73-22-01, Page 702.

2.2. Inspect the filter. If there is no evidence of any metal chips on the filter - wash and 

reinstall. Vent the fuel system.

2.3. If metal chips are found on the filter, evaluate finding as follows:

• Aluminum or bronze metal chips are not allowable.

• Metallic particles seen as reflection of light are allowable in maximum quantity of 

10 per filter segment (row) but not more than 30 for the filtering element.

• If in doubt consult „PZL-Hydral” S.A.
BULLETIN

Page 4

SECTION III

The first filter inspection to be performed by „PZL-Hydral” S.A. or authorized by „PZL-Hydral” 

S.A. technical personnel of the operator.

Next inspections to be performed by operator’s technical personnel. If in doubt consult „PZL- Hydral” S.A.

Note the inspection and results in the pump log book and in the engine log book.

Fax the results of the first inspection to WSK “PZL-Rzeszów” S.A. (fax no +48 17 866 7244) and 

„PZL-Hydral” S.A. (fax no +48 71 324 5078).

SECTION IV

„PZL-HYDRAL” S.A. incurs all the expenses connected with inspections made by „PZL- HYDRAL” S.A. personnel and with transport and repair of the ALRP-5 Fuel Metering Pump.