Battery Underwater Locator Beacon

Battery Underwater Locator Beacon

USM Airframe New Surplus

Part # 266E5542-00=ZB1

Hazmat
Hazmat
The L3Harris 90-Day ULB (part number 266E5542-00) is a durable acoustic beacon that emits an ultrasonic pulse for at least 90 days upon water immersion, aiding recovery of cockpit voice and flight data recorders after submersion.
Buy now from
Boeing Distribution (formerly Aviall)

Overview

L3Harris 90-Day Underwater Locator Beacon (ULB), part number 266E5542-00, is a long-life, battery-operated acoustic locator designed to be attached to an aircrafts Cockpit Voice Recorder (CVR) and Flight Data Recorder (FDR). Upon immersion it activates via a water switch and emits an ultrasonic pulse for a minimum of 90 days to assist recovery teams. The unit is engineered to withstand impact, deep-sea pressure, and other severe conditions. It is powered by a lithium battery with an extended shelf life and requires maintenance and battery replacement by certified aviation technicians.

Features & Benefits

  • Extended operational life: Operates for a minimum of 90 days after activation, increasing recovery time for search teams
  • Enhanced safety: Provides critical locating data for accident investigation and recovery efforts
  • Robust and durable: Engineered to withstand crash impact and deep-sea pressure
  • OEM approved: Intended for use on L3Harris flight recorders and listed in official supply chains
  • Certified for aerospace use: Designed to meet requirements of aviation authorities for flight recorder locating devices

Specifications

  • Part Number: 266E5542-00
  • Operating Life: 90 days minimum after activation
  • Technology: Acoustic pinger (ultrasonic pulse)
  • Frequency: 37.5 kHz (standard ULB) or 8.8 kHz (low-frequency ULB)
  • Power Source: Lithium battery
  • Shelf Life: 84 months (7 years)
  • Activation: Automatic upon immersion in water (via water switch)
Technical Information
  • Certifications: Designed for aerospace use and meets certifications from aviation authorities such as the FAA, EASA, and CAA

Technical Information

ATA Number

23,
31

ATA Chapter

Communications
Indicating / Recording Systems

ATA Group

Airframe Systems

ATA Section

VOICE RECORDER SYSTEM
FLIGHT DATA RECORDER (FDR)

FAA Approval Code

NO

Condition

New Surplus

Country of Origin

United States

Harmonized Tariff Schedule Code

8543909000

Lead Time (Days)

1

Shelf Life

No

Forecasted

Yes

Aircraft Makes

Boeing
Airbus

Aircraft Models

737-600
BBJ 737-800
757-200EM
737 MAX 8
767-200ERSF
737-400
55 more

Shipping Details

Hazmat Code

GPP

ECCN

7A994

Schedule B

8543909000

8130-3 Eligible

No

Hazmat

Yes

Part Explosive

No
Buy now from
Boeing Distribution (formerly Aviall)
Product information provided "as is", and Boeing may add, change, discontinue or remove product information at any time. Product photos may not be exact match to product delivered. See terms & conditions.