| AD Number | 48-22-01 | Status | Active |
| Effective Date | Not specified | Issue Date | Not specified |
| Docket Number | Unknown | Amendment | N/A |
| Product Type | ["Engine"] | Product Subtype | Not specified |
| CFR Part | --- - Part 39 | CFR Section | N/A |
| Citation | This information is not available. | ||
| Manufacturer(s) | Pratt & Whitney Division |
| Model(s) | Double Wasp CA15 Double Wasp CA17 Double Wasp CA18 Double Wasp CA19 Double Wasp CA3 Double Wasp CA5 Double Wasp CB16 Double Wasp CB17 Double Wasp CB3 Double Wasp CB4 Double Wasp R2800-97 |
48-22-01 PRATT & WHITNEY: Applies to Martin 202, Convair 240, and Douglas DC-6 Aircraft Powered With Double Wasp Engines Equipped With Water-Alcohol Injection System.
Compliance required prior to next flight.
If water injection lines to carbuertor are incorporated, the water system should be blanked off. This should be accomplished by disconnecting water feed line and installing 1/2-inch pipe plug in regulator entrance. Water vent line should be disconnected at regulator and 1/4-inch pipe plug installed. Water tank should be drained and pump disconnected to preclude inadvertent water flow or pump failure from dry running. If impracticable to secure lines with tape to prevent vibration, they should be removed and stored until system reactivated. Operation of aircraft should be restricted to dry takeoff power pending correction.
Water-alcohol injection systems may be reactivated provided either of the following two modifications are accomplished:
1. (a) Incorporate general control solenoid valve part 40R1009 (or equivalent approved by P&W No. 139262) in vapor vent line extending from water tank to water regulator and,
(b) Incorporate Mansfield and Green Co. check valve 31-B (P&W No. 139263) in water feed line extending from water pump to water regulator. The installation of these parts should be accomplished in accordance with instructions issued by Pratt and Whitney.
2. (a) Incorporate hydraulically operated check valve Airite Products No. 1015 (or equivalent approved by Pratt and Whitney) in vapor vent line extending from water tank to water regulator and,
(b) Incorporate Parker check valve No. 527-10D (or equivalent approved by Pratt and Whitney) in water feed line extending from water pump to water regulator. The installations of these parts should be accomplished in accordance with Consolidated Vultee Drawing 6121501-P.