The H9930 ground support headset offer maximum performance and reliability. It is designed with comfort in mind with features such as a super-soft head pad, adjustable headband, and comfortable gel ear seals. Adjustable hybrid wire-flex boom assembly, M-87 microphone, and a 23 dB passive noise reduction contribute to excellent voice communications.
This ground support headset (Alternate Part# H9930) features M-87 dynamic microphone, wire-flex mic boom, dual volume control, 6-foot extended coiled cord with military grade 7-pin belt station connector.
- Rugged & durable construction using marine grade stainless steel
- Dynamic earphones with stainless steel retainers
- Hybrid wire-flex boom assembly
- Dual volume control conveniently located on ear domes
- Undercut, comfort gel ear seals
- 4-chamber, air-flow pillow headpad
- Certified 23 dB passive NNR
Product Codes | |
|---|---|
| Mfr Part No: | 40990G-01 |
Weight: 14.2 oz (403 g)Communication Cord: 6 ft coiled cord with MAP-57 connectorCertified NNR 23 dBDome Material: lightweight ABSPotentiometer: 220Ω ±20% (2 each)Speaker Sensitivity: 100 dB SPL/1mW @ 1kHzSpeaker Frequency Response: 20 Hz — 20,000 HzMicrophone Impedance: 150Ω ±15ΩMicrophone Sensitivity: 49.77 dBuV to 55.79 dBuV @ 1kHz, 103 dB SPL @ 0.187inMicrophone Frequency Response: 200 Hz — 6 kHzMicrophone Total Harmonic Distortion: 200 Hz to 6 kHz, 5% @ 105dB above 20 uPaMicrophone Resistive Load: 150Ω ±15Ω
- Stock: Out of Stock - On Backorder
- Manufacturer Part #: 40990G-01
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Returns & refund summary
- 30-day return window — with prior return authorization, unopened in original packaging.
- Restocking fee: 20% on unopened items, 30% on open-box items.
- Refund processing fee: 5.51% applies to all refunds (returns, cancellations, core-fee refunds) regardless of reason.
- Return shipping: paid by buyer.
- Non-returnable categories: installed/used parts, special-order or rebuilt items, programmed items (incl. ELTs), batteries, AOG-priority orders, international orders.
Full terms: Return Policy.
Authenticity & authorization
All parts sold by American Aviation Parts are genuine factory products sourced through authorized distribution channels. Our authorization status varies by brand — for some brands we are a direct authorized dealer; for others we are an independent reseller through authorized distribution. Either way, the part you receive is the same factory product, with standard documentation available on request.
See our full Manufacturer Authorizations page for the current per-brand status.
Need traceability paperwork?
If your installation requires FAA Form 8130-3, manufacturer Certificate of Conformance, or other traceability documentation, please call 1-877-722-8727 or email [email protected] before placing the order so we can confirm what is available for this part.
Shipping
Standard ground, expedited, and AOG shipping options are available at checkout. Full shipping-cost tiers and timelines are published on our Delivery Information page.
