DOC AIRBUS | AMM A320FRepair of Hydraulic Leaks with Fly-Away Kit Components
TASK 20-23-11-300-009-A
Repair of Hydraulic Leaks with Fly-Away Kit Components
1. Reason for the Job
The fly-away kit is used to repair hydraulic tubes at an outstation to let the aircraft go back to its main base. It can also be used in the main base and at an outstation to do temporary or permanent repair. This is to prevent or decrease the period for which the aircraft is unserviceable when an external hydraulic leak is higher than the maximum permitted leak rate.
2. Job Set-up Information
A. Referenced Information
3. Job Set-up
Subtask 20-23-11-860-069-A
Subtask 20-23-11-917-108-A
[Rev.10 from 2021]
2026.03.31 22:59:28 UTC
Repair of Hydraulic Leaks with Fly-Away Kit Components
1. Reason for the Job
The fly-away kit is used to repair hydraulic tubes at an outstation to let the aircraft go back to its main base. It can also be used in the main base and at an outstation to do temporary or permanent repair. This is to prevent or decrease the period for which the aircraft is unserviceable when an external hydraulic leak is higher than the maximum permitted leak rate.
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TASK 20-23-11-300-003-A | Repair of CRES or Aluminum-Alloy or Titanium-Alloy Tubes with SIERRACIN/HARRISON H-fittings |
| TASK 20-23-11-300-004-A | Temporary Repair of Hydraulic Tubes |
| TASK 20-23-11-917-001-A | Tightening Practices for Hydraulic Connections |
| TASK 20-23-21-911-001-A | Removal/Installation of the Bobbins from their Housings and Installation of O-rings, Square Seals, and Back-up Rings on the Bobbins |
| TASK 20-29-00-911-002-A | Removal/Installation of an O-ring (Hydraulic Systems) |
Examples of Pipe Damage and Related Repair SchemeSubtask 20-23-11-860-069-A
A. Hydraulic fly-away kit
(1) The hydraulic fly-away kit is for:
(a) Repair of the hydraulic tubes (all materials):
(d) Installation of a blanking cap/plug to isolate the hydraulic component (with MMEL approval).
Subtask 20-23-11-860-070-A (1) The hydraulic fly-away kit is for:
(a) Repair of the hydraulic tubes (all materials):
- 6061-T6 aluminum alloy
- 21.6.9 corrosion-resistant steel
- TI 3AL 2.5V titanium alloy.
NOTE: It is not permitted to do a temporary repair on:
(b) Repair of the hydraulic system sealing by replacement of: - Coiled tubes
- The hydraulic tubes or the hydraulic flexible hoses installed on/in:
. The engine area
. The pylon box structure
. The pylon forward secondary-structure
. The fuel tanks
. The landing gear legs.
- The O-rings
- The bobbins.
(d) Installation of a blanking cap/plug to isolate the hydraulic component (with MMEL approval).
B. List of Fly-Away Kit Components
(a) MS21922 sleeves and MS21921 nuts
(b) H-fitting couplings
(c) Corrosion-resistant steel (21.6.9) tubes, ref. (ASNA3288) tube sections for repair between 2 H-fitting couplings
(2) Fittings and reducers
(a) Straight fittings and reducers
(b) Bulkhead and tee fittings
(c) Elbows
(d) Elbows with a swivel nut
(e) Plugs and caps
(a) AEROQUIP hoses
(a) O-rings
(b) Bobbin assemblies
(5) Optional tooling
(a) We also recommend that you put this tooling in the hydraulic fly-away kit:
4. ProcedureNOTE: This list gives the recommended Airbus components/quantities. It includes many types of parts which let operators do repairs in many areas of the hydraulic system.
Minimum quantities are supplied to keep a low weight. The operator must erase items from or add items to the list in relation with its requirements and experience. But the components must be in the Airbus Illustrated Part Catalog (IPC) or approved by the applicable Airworthiness Authorities.
The operator must select the components and repair methods and make sure that these obey the applicable directives of the Airworthiness Authorities.
(1) Connection after tube cutting Minimum quantities are supplied to keep a low weight. The operator must erase items from or add items to the list in relation with its requirements and experience. But the components must be in the Airbus Illustrated Part Catalog (IPC) or approved by the applicable Airworthiness Authorities.
The operator must select the components and repair methods and make sure that these obey the applicable directives of the Airworthiness Authorities.
(a) MS21922 sleeves and MS21921 nuts
| TUBE DIA. mm (in.) | SIZE | SLEEVE Part Number (P/N) | QTY | NUT P/N | QTY | OPTIONAL NUT P/N | QTY |
|---|---|---|---|---|---|---|---|
| 6.35 (1/4) | -04 | MS21922-4 | 5 | MS21921V4P | 5 | MS21921-4 | 5 |
| 9.53 (3/8) | -06 | MS21922-6 | 5 | MS21921V6P | 5 | MS21921-6 | 5 |
| 12.70 (1/2) | -08 | MS21922-8 | 5 | MS21921V8P | 5 | MS21921-8 | 5 |
| 15.88 (5/8) | -10 | MS21922-10 | 5 | MS21921V10P | 5 | MS21921-10 | 5 |
| 19.05 (3/4) | -12 | MS21922-12 | 5 | MS21921V12P | 5 | MS21921-12 | 5 |
| 25.40 (1) | -16 | MS21922-16 | 5 | MS21921V16P | 5 | MS21921-16 | 5 |
| TUBE DIA. mm (in.) | SIZE | H-FITTING P/N. | QTY |
|---|---|---|---|
| 6.35 (1/4) | -04 | 36011V04 | 2 |
| 9.53 (3/8) | -06 | 36011V06 | 2 |
| 12.70 (1/2) | -08 | 36011V08 | 2 |
| 15.88 (5/8) | -10 | 36011V10 | 2 |
| 19.05 (3/4) | -12 | 36011V12 | 2 |
| 25.40 (1) | -16 | 36011V16 | 2 |
| TUBE DIA. mm (in.) | SIZE | WALL THICKNESS mm (in.) | TUBE LENGTH mm (in.) | QTY |
|---|---|---|---|---|
| 6.35 (1/4) | -04 | 0.41 (0.016) | 203 (8) | 2 |
| 9.53 (3/8) | -06 | 0.51 (0.020) | 203 (8) | 2 |
| 12.70 (1/2) | -08 | 0.66 (0.026) | 305 (12) | 2 |
| 15.88 (5/8) | -10 | 0.84 (0.033) | 305 (12) | 2 |
| 19.05 (3/4) | -12 | 0.99 (0.039) | 406 (16) | 2 |
| 25.40 (1) | -16 | 1.32 (0.052) | 406 (16) | 2 |
(a) Straight fittings and reducers
| STRAIGHT FITTING P/N | QTY | REDUCER P/N | QTY | OPTIONAL REDUCER P/N | QTY |
|---|---|---|---|---|---|
| MS21902V4P | 2 | MS21916V6-4P | 2 | MS21916-6-4 | 2 |
| MS21902V6P | 2 | MS21916V8-6P | 2 | MS21916-8-6 | 2 |
| MS21902V8P | 2 | MS21916V10-8P | 2 | MS21916-10-8 | 2 |
| MS21902V10P | 2 | MS21916V12-10P | 2 | MS21916-12-10 | 2 |
| MS21902V12P | 2 | MS21916V16-12P | 2 | MS21916-16-12 | 2 |
| MS21902V16P | 2 | N/A | 2 | N/A | 2 |
| BULKHEAD FITTING P/N | QTY | OPTIONAL BULKHEAD FITTING P/N | QTY | TEE FITTING P/N | QTY |
|---|---|---|---|---|---|
| MS21924V4P | 2 | MS21924-4 | 2 | MS21905V4P | 2 |
| MS21924V6P | 2 | MS21924-6 | 2 | MS21905V6P | 2 |
| MS21924V8P | 2 | MS21924-8 | 2 | MS21905V8P | 2 |
| MS21924V10P | 2 | MS21924-10 | 2 | MS21905V10P | 2 |
| MS21924V12P | 2 | MS21924-12 | 2 | MS21905V12P | 2 |
| MS21924V16P | 2 | MS21924-16 | 2 | MS21905V16P | 2 |
| ELBOW (90 Deg.) P/N | QTY | ELBOW (45 Deg.) P/N | QTY |
|---|---|---|---|
| MS21904V4P | 2 | MS21907V4P | 2 |
| MS21904V6P | 2 | MS21907V6P | 2 |
| MS21904V8P | 2 | MS21907V8P | 2 |
| MS21904V10P | 2 | MS21907V10P | 2 |
| MS21904V12P | 2 | MS21907V12P | 2 |
| MS21904V16P | 2 | MS21907V16P | 2 |
| ELBOWS (90 Deg.) P/N | QTY | ELBOWS (45 Deg.) P/N | QTY |
|---|---|---|---|
| NAS1762J0404 | 2 | NAS1761J0404 | 2 |
| NAS1762J0606 | 2 | NAS1761J0606 | 2 |
| NAS1762J0808 | 2 | NAS1761J0808 | 2 |
| NAS1762J1010 | 2 | NAS1761J1010 | 2 |
| NAS1762J1212 | 2 | NAS1761J1212 | 2 |
| NAS1762J1616 | 2 | NAS1761J1616 | 2 |
| PLUG P/N | QTY | CAP P/N | QTY |
|---|---|---|---|
| MS21913V4P | 2 | MS21914V4P | 2 |
| MS21913V6P | 2 | MS21914V6P | 2 |
| MS21913V8P | 2 | MS21914V8P | 2 |
| MS21913V10P | 2 | MS21914V10P | 2 |
| MS21913V12P | 2 | MS21914V12P | 2 |
| MS21913V16P | 2 | MS21914V16P | 2 |
NOTE: MS21913-XX plugs are not applicable for the plugging of the female ports of hydraulic manifolds. The hexagon shape can cause seal extrusion.
(f) Plugs and O-rings for MS33649 ports | PORT SIZE | PLUG P/N | QTY | O-RING P/N | QTY |
|---|---|---|---|---|
| -04 | AS5169D04L | 2 | NAS1612-4 | 2 |
| -05 | AS5169D05L | 2 | NAS1612-5 | 2 |
| -06 | AS5169D06L | 2 | NAS1612-6 | 2 |
| -08 | AS5169D08L | 2 | NAS1612-8 | 2 |
| -10 | AS5169D10L | 2 | NAS1612-10 | 2 |
| -12 | AS5169D12L | 2 | NAS1612-12 | 2 |
| -16 | AS5169D16L | 2 | NAS1612-16 | 2 |
| -20 | AS5169D20L | 2 | NAS1612-20 | 2 |
| -24 | AS5169D24L | 2 | NAS1612-24 | 2 |
NOTE: It is necessary to safety the AS5169DXXL plugs with stainless steel lockwire 0.8 mm (0.0315 in.) DIA. (Material No. 19-010) after installation.
(3) Flexible hoses (a) AEROQUIP hoses
| TUBE DIA. mm (in.) | SIZE | HOSE LENGTH mm (in.) | QTY | AEROQUIP HOSE P/N |
|---|---|---|---|---|
| 6.35 (1/4) | -04 | 305 (12) | 1 | AE2460010E0120 |
| 6.35 (1/4) | -04 | 508 (20) | 1 | AE2460010E0200 |
| 9.53 (3/8) | -06 | 406 (16) | 1 | AE2460010G0160 |
| 9.53 (3/8) | -06 | 914 (36) | 1 | AE2460010G0360 |
| 12.70 (1/2) | -08 | 533 (21) | 1 | AE2460010H0210 |
| 12.70 (1/2) | -08 | 1016 (40) | 1 | AE2460010H0400 |
| 15.88 (5/8) | -10 | 610 (24) | 1 | AE2460010J0240 |
| 15.88 (5/8) | -10 | 1016 (40) | 1 | AE2460010J0400 |
| 19.05 (3/4) | -12 | 610 (24) | 1 | AE2460010K0240 |
| 19.05 (3/4) | -12 | 1016 (40) | 1 | AE2460010K0400 |
| 25.40 (1) | -16 | 610 (24) | 1 | AE1010735M0240 |
| 25.40 (1) | -16 | 1270 (50) | 1 | AE1010735M0500 |
NOTE: The hose length is given for information. The supplier drawing gives the accurate length and tolerance information.
(b) TITEFLEX hoses | TUBE DIA. mm (in.) | SIZE | HOSE LENGTH mm (in.) | QTY | TITEFLEX HOSE P/N |
|---|---|---|---|---|
| 6.35 (1/4) | -04 | 305 (12) | 1 | 24060604-0120 |
| 6.35 (1/4) | -04 | 508 (20) | 1 | 24060604-0200 |
| 9.53 (3/8) | -06 | 406 (16) | 1 | 24060606-0160 |
| 9.53 (3/8) | -06 | 914 (36) | 1 | 24060606-0360 |
| 12.70 (1/2) | -08 | 533 (21) | 1 | 24060608-0210 |
| 12.70 (1/2) | -08 | 1016 (40) | 1 | 24060608-0400 |
| 15.88 (5/8) | -10 | 610 (24) | 1 | 24060610-0240 |
| 15.88 (5/8) | -10 | 1016 (40) | 1 | 24060610-0400 |
| 19.05 (3/4) | -12 | 610 (24) | 1 | 24060612-0240 |
| 19.05 (3/4) | -12 | 1016 (40) | 1 | 24060612-0400 |
| 25.40 (1) | -16 | 610 (24) | 1 | 24060616-0240 |
| 25.40 (1) | -16 | 1270 (50) | 1 | 24060616-0500 |
NOTE: The hose length is given for information. The supplier drawing gives the accurate length and tolerance information.
(4) O-rings and bobbin assemblies (a) O-rings
| PORT SIZE | O-RING P/N | QTY | OPTIONAL O-RING P/N | QTY | OPTIONAL O-RING P/N | QTY |
|---|---|---|---|---|---|---|
| -04 | EN6076-04 | 5 | NAS1612-4A | 5 | NAS1602-904 | 5 |
| -05 | EN6076-05 | 5 | NAS1612-5A | 5 | NAS1602-905 | 5 |
| -06 | EN6076-06 | 5 | NAS1612-6A | 5 | NAS1602-906 | 5 |
| -08 | EN6076-08 | 5 | NAS1612-8A | 5 | NAS1602-908 | 5 |
| -10 | EN6076-10 | 5 | NAS1612-10A | 5 | NAS1602-910 | 5 |
| -12 | EN6076-12 | 5 | NAS1612-12A | 5 | NAS1602-912 | 5 |
| -16 | EN6076-16 | 5 | NAS1612-16A | 5 | NAS1602-916 | 5 |
| -20 | EN6076-20 | 5 | NAS1612-20A | 5 | NAS1602-920 | 5 |
| -24 | EN6076-24 | 5 | NAS1612-24A | 5 | NAS1602-924 | 5 |
| PORT SIZE | BOBBIN P/N | QTY |
|---|---|---|
| -04 | NSA8687-4 | 2 |
| -05 | NSA8687-5 | 2 |
| -06 | NSA8687-6 | 2 |
| -08 | NSA8687-8 | 2 |
| -10 | NSA8687-10 | 2 |
| -12 | NSA8687-12 | 2 |
| -16 | NSA8687-16 | 2 |
(a) We also recommend that you put this tooling in the hydraulic fly-away kit:
- A set of chipless roller-type cutters
- A set of deburring tools
- A hydraulic-seal assembly tool-set
- A bobbin removal and ring installation tool-set.
Subtask 20-23-11-917-108-A
A. Repair of Hydraulic Tubes with the Fly-Away Kit Components
(1) MS21922 sleeve method (with no flexible hose)
(b) A temporary repair with the MS21922 sleeve method is approved for a period of not more than 2500 Flight Hours. You must do a permanent repair or install a new tube before the end of this period.
(c) This method is applicable for these tube materials:
(b) This method is applicable for these tube materials:
Subtask 20-23-11-917-109-A NOTE: The fly-away kit is used to repair hydraulic tubes at an outstation to let the aircraft go back to its main base. It can also be used in the main base and at an outstation to do temporary or permanent repair.This is to prevent or decrease the period for which the aircraft is unserviceable when an external hydraulic leak is higher than the maximum permitted leak rate.
The fly-away kit lets you do these repair methods: (1) MS21922 sleeve method (with no flexible hose)
NOTE: This method gives a temporary repair and uses standard wrenches.
NOTE: You install the MS21922 sleeves with MS21921 nuts and MS21902 unions (or other unions with MS33514 or MS33315 fitting ends).
(a) You must obey the procedure for the temporary repair of hydraulic tubes (Ref. AMM TASK 20-23-11-300-004) when you install MS21922 sleeves. (b) A temporary repair with the MS21922 sleeve method is approved for a period of not more than 2500 Flight Hours. You must do a permanent repair or install a new tube before the end of this period.
(c) This method is applicable for these tube materials:
- Aluminum alloy (6061-T6)
- Corrosion-resistant steel (21.6.9).
NOTE: This method gives a temporary repair and uses standard wrenches.
NOTE: You install the MS21922 sleeves with MS21921 nuts and MS21902 unions (or other unions with MS33514 or MS33315 fitting ends).
(a) A temporary repair with a flexible hose has: - Installation conditions
- Life-limit conditions
- Inspection conditions.
You must refer to and obey the procedure for the temporary repair of hydraulic tubes (Ref. AMM TASK 20-23-11-300-004) when you install flexible hoses.
- Aluminum alloy (6061-T6)
- Corrosion-resistant steel (21.6.9).
NOTE: This method gives a permanent repair with connections that you cannot subsequently remove. It uses standard wrenches.
(a) You must obey the procedure for the repair of hydraulic tubes with H-FITTING couplings (Ref. AMM TASK 20-23-11-300-003) when you install H-FITTING couplings. (b) This method is applicable for these tube materials:
- Aluminum alloy (6061-T6)
- Corrosion-resistant steel (21.6.9)
- Titanium alloy (TI 3AL 2.5 V).
B. Repair of Hydraulic System Sealing
(1) You must obey the procedure for the tightening practices for hydraulic connections (Ref. AMM TASK 20-23-11-917-001) when you install screwed connections.
(2) You must obey the procedure for the removal/installation of the bobbins from their housings and installation of O-ring, square seals and back-up rings on the bobbins procedure (Ref. AMM TASK 20-23-21-911-001) when you install bobbins.
(3) You must obey the removal/installation of O-ring on straight plug-in union (or manifold plug) and installation of straight plug-in unions (or manifold plugs) procedure (Ref. AMM TASK 20-29-00-911-002) when you install O-rings and straight plug-in unions (or manifold plugs).
(1) You must obey the procedure for the tightening practices for hydraulic connections (Ref. AMM TASK 20-23-11-917-001) when you install screwed connections.
(2) You must obey the procedure for the removal/installation of the bobbins from their housings and installation of O-ring, square seals and back-up rings on the bobbins procedure (Ref. AMM TASK 20-23-21-911-001) when you install bobbins.
(3) You must obey the removal/installation of O-ring on straight plug-in union (or manifold plug) and installation of straight plug-in unions (or manifold plugs) procedure (Ref. AMM TASK 20-29-00-911-002) when you install O-rings and straight plug-in unions (or manifold plugs).