SOW_3_Crossarm_Assembly_Repair_of__the_Visibility_Cross-Arm_S100-2MT5A2_11-20-2024-R.docx

STATEMENT OF WORK 3 – CROSSARM ASSEMBLY

Statement of Work Repair and Recondition: Automated Surface Observing System (ASOS) Visibility Cross-Arm Assembly

ASN: S100-2MT5A2, NSN: 5340-01-368-4827

Version: November 20, 2024

Description: The Contractor shall repair and recondition the Visibility Cross-Arm Assembly to "Like New" operating condition, including cosmetic appearance in accordance with this Statement of Work (SOW), National Weather Service (NWS) specification drawing, or other specification documents. The repair and reconditioning price shall include the parts, materials, labor, inspection, and return shipping necessary to return the Visibility Cross-Arm Assembly to operational specifications. Repair materials or specifications differing from the NWS source specification must be approved by the National Weather Service prior to use.

Definition:

(a) Supplies: includes but is not limited to raw materials, components, intermediate assemblies, end products, and various supplies.

(b) Repair and Reconditioning: As outlined in Description of Work paragraph below.

(c) “Like New” Condition means reconditioned to the listed specification to meet all applicable electrical, mechanical, and cosmetic specifications and engineering documentation, including the replacement of damaged, missing, or non-functioning parts.

Government Furnished Equipment: The National Reconditioning Center (NRC) can provide heaters, seals and gaskets, cable guides, window lens, bird spike, and cover plates on an as-needed basis. If a request needs to be made, please contact the Contracting Official for assistance.

Government Furnished Data: No government furnished data.

Vendor Furnished Equipment: Vendor shall provide all parts, supplies, and test equipment as required to accomplish the repair and reconditioning actions.

Recommended Equipment and Supplies: The vendor is responsible for all equipment and supplies. The paint used should be similar to Sherwin-Williams F8W2030 (WAEM-511 GMC White). If there is any need for information related to equipment or supplies, contact the Contracting Official for assistance.

Description of Work – Work Procedures: Inspect the S100-2MT5A2, Visibility Cross-Arm Assembly for major defects. If none found, proceed with the repair. If major defects exist that would prevent the repair of the unit, contact the Contracting Official for assistance.

The following steps may be accomplished in any order deemed necessary by the vendor.

Remove caps from Cross-Arm. If unit has a mid-point access cover, remove the cover. Clean the inside of the assembly. Clean all parts as necessary. Inspect lens area, and clean with alcohol.

Strip, prepare, prime, and paint cross-arm and any painted parts as needed. Care should be taken not to paint any grounding points or authorized labels. Quality should be considered in “Like New” condition.

Inspect electrical wiring, connectors, coax cable, and components for corrosion, physical damage, and electrical damage. Inspect white 3 pin Molex connectors and ensure connectors are undamaged. If pins are damaged and need to be replaced, please contact the Contracting Official for a list of approved parts and tools to perform this repair. Inspect black connectors and verify high-tension gold-plated pins are used, and wires do not show excessive discoloration due to overheating. Repair or replace unacceptable parts as needed. Wire harness needs to be approximately 124” from cross-arm cable exit to connectors. Ground wire needs to be 120” minimum.

Inspect A2W2P1 and A2W3P1 electrical pins and replace if they are not the authorized part:

Connectors A2W2P1 and A2W3P1 Electrical Pin Molex Part Number: 16020104

· Ensure electrical pins are correct as shown:

Acceptable Electrical Pin

Molex Part Number: 16020104

Unacceptable Electrical Pin

Unauthorized Part

Reassemble the unit, replacing all missing, corroded, or worn hardware. Lubricate latch and verify its operation. Replace gaskets and seals in the caps and access cover as needed.

Resistance test all cables and heaters and verify readings are passing.

TX & RX Window Heater: +/- 2% of TX & RX ohm values TX & RX Hood Heater: +/- 2% of TX & RX ohm values TX & RX Electronics Heater: +/- 2% of TX & RX ohm values

Replace the heaters as necessary to achieve the proper ohm value balance. While testing the heaters, press down on connection point to verify no intermittent connection exist. While testing connectors, move wires to verify no intermittent connection exists.

Warranty Terms: The Contractor will provide a 1-year warranty against material workmanship and against faults occurring during operation. This 1-year warranty will begin after passing the final equipment inspection and acceptance for stock.

NRC Final Acceptance: All repaired and reconditioned Visibility Cross-Arm Assemblies are subject to Performance Quality Assurance testing/inspection and will be returned for corrections if discrepancies are found. All repaired and reconditioned Visibility Cross-Arm Assemblies will be inspected for material workmanship and tested for operational performance at the NRC in accordance with the listed specifications. To meet the material workmanship requirements, the Visibility Cross-Arm Assembly will need to be in a “Like New” operating condition and good appearance and condition for example the unit’s paint job, cables (no insulation nicks or exposed wires), connectors and associated hardware. All connectors and pins will be inspected to ensure no corrosion is present and the correct parts are installed. The length of each cable harness and ground cable will be measured. The NRC’s Inspection Branch will verify units meet both material and operational requirements and test each unit for proper and accurate functionality in the ASOS system. Any inspected item that does not meet the acceptance criteria will be returned to the vendor for rework at no additional cost to the government.

Deliverables: Each repaired and reconditioned Visibility Cross-Arm Assembly, by serial number, shall be supplied with a Repair Report documenting the repair, reconditioning and inspection to include results of all tests and failure analysis.

Shipping Address:

NATIONAL RECONDITIONING CENTER (NRC)

14200 MERRITT RD.

GRANDVIEW, MO. 64030

Transportability: Vendor is responsible for returning repaired products in a shipping container designed to withstand the vibration and shock encountered during transportation by ship, rail, truck, and aircraft. The units shall be packaged to prevent damage to include: physical, electrical, mechanical, cosmetic, and the units shall not be damaged or lose performance capability.

Final Note: When unforeseen problems arise, that may need clarification, please contact the Contracting Official immediately. If the unit has any problem that prevents a quality repair, do not work on the item until the issue can be resolved.

NRC Reviewed:

WSRB Repair Branch Review: Marcus Stevenson, Branch Chief, November 20, 2024 TI&MR Branch Review: Gregory Flores, Branch Chief, November 20, 2024 image1.jpeg image2.jpeg